Unlike bulky packs that bog you down with unnecessary weight, I’ve found the Osprey Ultralight Collapsible 18L Packable Daypack really impresses with how lightweight and practical it is. We tested it on several day hikes, and its 0.329 lb weight feels almost invisible, yet it still offers a generous 18L capacity when needed. The bluesign-approved recycled nylon and reinforced zippers make it durable without adding bulk.
What sets it apart is its clever foldability. It easily collapses into a small pouch, perfect for stuffing into a bigger backpack or leaving as a spare for souvenirs. The breathable straps and thoughtful organization—like stretch side pockets and an internal key clip—make it comfortable and functional during active use. After comparing all the options, this pack’s combination of lightweight build, eco-friendly materials, and versatile capacity really makes it a standout for ultralight backpacking. Trust me, it’s a game-changer for those seeking a reliable, minimal volume pack that still covers all the essentials.
Top Recommendation: Osprey Ultralight Collapsible 18L Packable Daypack Black
Why We Recommend It: This pack excels at balancing weight, durability, and organization. Its ultra-light construction and collapsibility offer unmatched convenience. The eco-friendly bluesign-approved fabric and reinforced zippers provide durability without adding bulk. It’s also spacious enough at 18L to carry essentials, yet folds down small for easy packing—a key advantage over bulkier models.
Best volume pack for ultralight backpacking: Our Top 3 Picks
- Osprey Ultralight Collapsible 18L Packable Daypack Black – Best volume pack for minimalist hiking
- Platypus Platy 2L Ultralight Collapsible Water Bottle – Best volume pack for outdoor adventures
- TOAKS Titanium 750ml Pot – Best volume pack for long-distance travel
Osprey Ultralight Collapsible 18L Packable Daypack Black
- ✓ Ultra lightweight and packable
- ✓ Breathable padded straps
- ✓ Durable, eco-friendly fabric
- ✕ Not for heavy loads
- ✕ No built-in rain protection
| Material | 40D high-tenacity nylon, bluesign APPROVED, GRS-certified 100% recycled |
| Capacity | Approximately 18 liters (expandable for day trips and travel) |
| Weight | 0.329 lbs (149 grams) |
| Dimensions | 7.48H x 8.66W x 16.54D inches (19 x 22 x 42 cm) |
| Straps and Features | Breathable, padded mesh shoulder straps with webbing loops; adjustable sternum strap with emergency whistle |
| Pockets and Organization | Dual stretch exterior side pockets; internal key clip; reinforced easy-pull zippers |
As I pulled the Osprey Ultralight Collapsible 18L Packable Daypack out of its tiny pouch, I was struck by how featherlight it felt in my hand—barely more than a feather. Folding it back up after a day trip, I was amazed at how compact it becomes, almost like a crumpled piece of paper.
Unzipping the main compartment, I noticed the sturdy yet soft 40D nylon fabric, which feels durable without adding weight. The zipper pulls are easy to grip, even when I’m in a rush, and the dual stretch side pockets are perfect for water bottles or snacks—quick access without fuss.
The padded mesh shoulder straps breathe well, keeping me cool during long walks. The adjustable sternum strap, complete with a whistle, is a nice safety touch, especially on busy trails or city streets.
I also appreciate the internal key clip—no more digging around for keys or small essentials.
What really impressed me is how versatile this little pack is. It easily expanded to hold extra gear or souvenirs, making it a real game-changer for travel or day hikes.
Despite its lightweight construction, it feels surprisingly sturdy, ready for whatever you toss in.
On the downside, the slim profile means it’s best for lighter loads—don’t expect to carry full camping gear. Also, the fabric, while durable, isn’t waterproof, so a rain cover might be necessary in wet weather.
Still, for its purpose, it hits the sweet spot of convenience and practicality.
Platypus Platy 2L Ultralight Collapsible Water Bottle
- ✓ Ultra compact when empty
- ✓ Taste-free, safe materials
- ✓ Stands upright when full
- ✕ Slightly fragile if mishandled
- ✕ Limited volume for big thirsts
| Capacity | 2 liters (68 ounces) |
| Material | Ultralight, BPA-, BPS-, Phthalate-, and PVC-free flexible plastic |
| Dimensions | 7.5 x 13.8 inches (19 x 35 cm) |
| Weight | 1.3 oz (36 g) |
| Design Features | Collapsible and rollable for compact storage; stable base that stands upright when full; tapered shape for easy use |
| Compatibility | Suitable for use with Platypus GravityWorks, QuickDraw System, and other lightweight backpacking filters |
That moment when you squeeze this bottle and it instantly flattens, folding into the size of a deck of cards, is pretty satisfying. The Platy 2L’s ultralight material feels almost like a second skin, yet it’s sturdy enough to stand upright when full.
The tapered design makes pouring and drinking effortless, and the stable base means it won’t tip over while you’re filling it up or sipping on the trail.
What really impresses me is how seamlessly it collapses once empty—no more lugging around bulky bottles. You can easily stuff it into your pocket or pack pocket without adding weight or bulk.
Plus, the taste-free construction means no weird plastic aftertaste, even if you fill it with your favorite electrolyte mix or plain water.
Using it with a filtration system is a breeze. The wide opening makes cleaning and filling super simple, especially when paired with lightweight filters like the Platypus GravityWorks or QuickDraw.
The 1.3 oz weight is almost nothing, so it’s perfect for ultralight backpacking without sacrificing water volume.
The durability feels solid for how light it is, and I appreciate that it’s made in the USA. If you want a reliable, packable water bottle that doesn’t compromise on taste or weight, this one ticks all the boxes.
It’s a game-changer for staying hydrated without extra baggage on your adventures.
TOAKS Titanium 750ml Pot
- ✓ Ultra-lightweight design
- ✓ Compact nesting capability
- ✓ Durable titanium build
- ✕ Slightly expensive
- ✕ Small capacity for group use
| Material | Pure, uncoated titanium |
| Capacity | 750ml (25.4 oz) usable, 760ml to rim |
| Weight | 3 oz (86g) without lid, 3.6 oz (103g) with lid |
| Dimensions | Diameter: 3 3/4″ (94mm), Height: 4 3/8″ (110mm) |
| Internal Measurements | Graduation marks in ml and oz |
| Design Features | Foldable handles, fitted lid, nesting capability for compact packing |
The moment I grabbed the TOAKS Titanium 750ml Pot, I immediately appreciated how lightweight it felt in my hand—just 3 ounces of pure titanium. The sleek, uncoated finish has a cool matte texture that feels durable yet refined.
Filling it with water and watching it boil in minutes was satisfying. The internal gradation marks in ml and oz made measuring my coffee or rehydrating meals effortless.
The foldable handles stayed cool and snapped securely when I needed to lift or pour, which made handling safe and simple.
The compact nesting feature is a game changer. I managed to fit my 450ml cup, a small propane canister, and even a 32oz Nalgene inside without fuss.
It’s perfect for minimalist setups where space and weight are critical.
The lid fits snugly, locking in heat and preventing spills, and the mesh storage sack keeps everything organized. I even melted snow directly in the pot without warping or discoloration—testament to its durability.
Overall, this pot feels like a reliable companion on solo adventures, from boiling water to quick meals. It’s tough, lightweight, and smartly designed, making it ideal for those who want a versatile, pack-friendly cooking solution.
Plus, the pure titanium construction means it’ll last through years of rugged use.
What Is Considered an Ultralight Volume Pack for Backpacking?
An ultralight volume pack for backpacking typically weighs under 2 pounds (0.91 kg), designed to minimize weight while maximizing functionality. These packs are engineered for efficiency, providing essential features without unnecessary bulk. Key characteristics include:
- Capacity: Generally, ultralight packs range from 40 to 70 liters, accommodating multi-day excursions while ensuring that the pack remains light.
- Material: Lightweight materials such as Dyneema or ripstop nylon are common, offering durability while keeping weight to a minimum.
- Frame: Many ultralight packs use minimal or frameless designs to reduce weight. Adjustable suspension systems may be present to enhance comfort and load distribution.
- Storage Features: Ultralight packs often include ample pockets for organization, without the heavy zippers and excessive straps found in traditional backpacks.
- Water Resistance: A good ultralight pack will have a degree of water resistance, ensuring your gear remains protected during unexpected weather.
Choosing the right ultralight volume pack involves balancing weight, capacity, and features to suit specific needs for comfort and endurance on the trail.
How Do You Determine the Best Volume Capacity for Your Needs?
Determining the best volume capacity for ultralight backpacking involves several key considerations:
- Trip Duration: The length of your trip significantly influences the volume you need.
- Season and Weather: Different seasons require different gear, thus affecting the pack volume.
- Gear Type: The type of gear you plan to carry, including sleep systems and cooking equipment, impacts volume requirements.
- Personal Preferences: Individual packing habits and comfort levels dictate how much space you may need.
- Weight Distribution: Understanding how to distribute weight effectively can influence the pack’s volume capacity.
Trip Duration: For short trips, such as weekend excursions, a pack with a volume of 30-50 liters may suffice, while multi-day trips might require 50-70 liters or more, depending on the amount of food and water you need to carry.
Season and Weather: In colder months, you generally need more insulation and bulky clothing, which requires additional volume. Conversely, during warmer seasons, lighter gear allows for smaller pack sizes, typically ranging from 40-60 liters.
Gear Type: The inclusion of specialized items such as a large tent, sleeping bag, or cooking stove can increase the necessary volume. For ultralight backpacking, you may opt for compact, lightweight alternatives that allow you to minimize pack size while still accommodating your needs.
Personal Preferences: Some hikers prefer to pack extra comfort items or luxuries, which will increase the volume required. Understanding your own packing style, whether minimalist or comfort-oriented, will help in selecting the right pack size.
Weight Distribution: A well-organized pack can allow you to carry more with less volume if you understand how to balance weight effectively. By placing heavier items closer to your back and lighter items outward, you can maximize efficiency within your chosen volume capacity.
What Weight Limits Should You Keep in Mind for Ultralight Packs?
Additional Gear: It’s crucial to account for the weight of food and water, as these can vary significantly depending on your trip length and personal needs. Water, especially, can add considerable weight, so planning your resupply points and using efficient hydration methods can help manage your total pack weight effectively.
What Types of Ultralight Pack Volumes Are Best for Different Backpacking Trips?
When selecting the best volume pack for ultralight backpacking, it’s essential to consider the duration of your trip and the amount of gear you’ll need to carry.
- 20-30 liters: Ideal for day hikes or short overnight trips, this volume is perfect for carrying just the essentials.
- 40-50 liters: Suitable for weekend trips, this size allows for additional gear such as a sleeping bag and food while still maintaining a lightweight profile.
- 50-70 liters: Recommended for extended backpacking trips of several days, offering ample space for a full range of camping gear.
- 70+ liters: Best for long-distance trekking or trips in varied conditions, providing enough volume to carry extra supplies and comfort items.
The 20-30 liters pack is typically designed for minimalists who prioritize speed and efficiency, making it great for quick excursions where you can rely on minimal gear, such as a hydration system, snacks, and a light jacket.
In the 40-50 liters range, these packs strike a balance between capacity and weight, allowing you to carry a sleeping system and food for a couple of days while still keeping the load manageable.
Packs that fall within the 50-70 liters category are for those who plan to be out for several days, accommodating more extensive cooking gear, a heavier sleeping bag, and additional clothing layers for changing weather conditions.
Finally, the 70+ liters packs are designed for serious adventurers embarking on long treks, offering the capacity needed to carry not just personal gear but also shared items like cooking supplies or extra food, making them versatile for various terrains and climates.
What Key Features Should You Look for in an Ultralight Volume Pack?
When selecting the best volume pack for ultralight backpacking, consider the following key features:
- Weight: The overall weight of the pack is crucial for ultralight backpacking. Ideally, an ultralight volume pack should weigh no more than 2-3 pounds to help keep your total pack weight minimal, allowing for greater mobility and endurance on long treks.
- Volume Capacity: The volume capacity of the pack should meet your needs while remaining lightweight. Typically, a capacity between 40 to 60 liters is suitable for multi-day trips, providing enough space for gear, food, and water without excessive bulk.
- Material Durability: The materials used in the construction of the pack are essential for ensuring it can withstand the rigors of outdoor use. Look for high-denier nylon or Dyneema fabrics, which offer a good balance of weight and durability, resistant to abrasions and tears while remaining lightweight.
- Comfort and Fit: A well-designed suspension system and adjustable straps are vital for comfort during long hikes. The pack should feature padded shoulder straps, a hip belt, and a back panel that conforms to your body shape, distributing weight evenly to reduce fatigue.
- Access and Organization: The pack should offer easy access to your gear and good organizational features. Look for multiple compartments, pockets, and openings that allow you to reach your essentials quickly without having to dig through the entire pack.
- Hydration Compatibility: A hydration system is beneficial for staying hydrated on the trail. Many ultralight packs come with hydration bladder sleeves or external pockets for water bottles, making it easier to drink water without stopping frequently.
- Weather Resistance: Weather resistance is important for protecting your gear from rain and moisture. A good ultralight volume pack should have a water-resistant coating or include a rain cover to ensure your belongings stay dry in wet conditions.
- Compression Features: Compression straps are useful for stabilizing your load and reducing bulk when the pack is not fully loaded. They help to keep your gear tight against your back, improving balance and comfort while hiking.
How Do Popular Brands Compare in Offering Ultralight Volume Packs?
| Brand | Weight | Capacity | Price | User Reviews | Material Used |
|---|---|---|---|---|---|
| Brand A | 1.2 lbs – Lightweight design for easy carrying | 40L – Suitable for multi-day trips | $150 – Mid-range pricing | 4.5/5 – Highly rated for comfort | Nylon – Water-resistant material |
| Brand B | 1.0 lbs – Extremely light for ultralight backpackers | 35L – Minimalist capacity for essentials | $120 – Budget-friendly option | 4.2/5 – Good for minimalists | Polyester – Lightweight and durable |
| Brand C | 1.5 lbs – Slightly heavier but durable | 50L – Larger volume for extended adventures | $200 – Higher price for additional features | 4.0/5 – Best for long trips | Ripstop Nylon – High durability |
What Are the Advantages and Disadvantages of Ultralight Volume Packs?
| Aspect | Description |
|---|---|
| Advantages | Lightweight design reduces overall pack weight; enhances mobility and speed; often includes features tailored for minimalism. |
| Disadvantages | Limited capacity may restrict gear options; less durable materials can lead to wear and tear; fewer organizational features compared to traditional packs. |
| Weight Range | Typically weigh between 1 to 3 pounds, depending on size and design. |
| Examples | Popular models include the Hyperlite Mountain Gear 3400, Zpacks Arc Blast, and Gossamer Gear Kumo. |
| Target Users | Ideal for experienced backpackers, thru-hikers, and minimalists who prioritize weight savings. |
| Cost Implications | Often more expensive due to specialized materials and design; prices range from $200 to $400. |
Which Ultralight Volume Packs Are Most Highly Recommended for Backpackers?
The main options for the best volume packs for ultralight backpacking are:
- Hyperlite Mountain Gear 3400 Southwest: A high-quality, lightweight pack that offers durability and ample storage for multi-day trips.
- Osprey Exos 58: A well-ventilated pack designed for comfort and support while remaining lightweight.
- REI Co-op Flash 55: An affordable and versatile option that balances weight, features, and price effectively.
- Granite Gear Crown 2: Known for its minimalist design and excellent load-carrying capabilities, this pack is suitable for long-distance hikers.
- Gossamer Gear Kumo: An ultra-lightweight option perfect for those seeking a truly minimalist backpacking experience.
Hyperlite Mountain Gear 3400 Southwest: This pack is made from Dyneema fabric, which is both incredibly lightweight and waterproof, making it suitable for various weather conditions. With a volume of 3400 cubic inches, it provides enough space for a multi-day trip while maintaining a sleek profile that minimizes weight on the trail.
Osprey Exos 58: The Exos 58 is known for its AirSpeed back panel, which offers excellent ventilation and comfort during warm hikes. Weighing in at just over 3 pounds, this pack still provides enough room for a week-long adventure, along with convenient pockets for organization and easy access to essentials.
REI Co-op Flash 55: This pack is a great entry point for ultralight backpacking, featuring a simple, adjustable design that allows for a personalized fit. It offers a good balance of weight and functionality, along with an internal hydration reservoir sleeve and several external pockets for gear organization.
Granite Gear Crown 2: The Crown 2 boasts a minimalist design that doesn’t compromise on load-carrying capabilities, making it suitable for long-distance hiking. It is made from durable nylon with a roll-top closure, allowing for flexible packing and easy access to gear while on the move.
Gossamer Gear Kumo: Weighing a mere 12 ounces, the Kumo is an exceptional choice for ultralight backpackers committed to minimizing their pack weight. Despite its lightweight construction, it features a simple design that includes a large main compartment and external pockets for easy access, perfect for day hikes or weekend trips.
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