Lightweight Backpacking Packs for Thru-Hiking and Multi-Day Adventures
Ultralight backpacks have changed the way hikers approach long-distance adventures. Advances in materials, frame designs, and suspension systems have made it possible to carry large amounts of gear while keeping pack weight significantly lower than traditional backpacks.
Most modern ultralight backpacks in the 40L-60L range weigh around 2-3 pounds and are designed to comfortably carry approximately 25-35 pounds of backpacking equipment, food, fuel, and water. For heavier loads, a more traditional backpack may provide better support, while lighter loads may benefit from frameless ultralight packs.
Frame systems remain an important feature for multi-day backpacking. Aluminum stays, lightweight frames, and ventilated suspension designs help transfer weight efficiently from the shoulders to the hips while improving comfort on longer trips.
Best Ultralight Backpacks With Frames of 2026
| Model | Weight | Material | Best For |
|---|---|---|---|
| Hyperlite Mountain Gear Southwest 55 | 29.8 oz | Dyneema Woven Composite | Thru-hiking |
| Durston Kakwa 55 | 31.5 oz | Ultra 200X / UltraGrid | Long-distance backpacking |
| Gossamer Gear Gorilla 50 | 31.9 oz | Robic Nylon | Lightweight multi-day trips |
| Zpacks Arc Haul Ultra 60 | 20.9 oz | Ultra 100X | Ultralight adventures |
| Granite Gear Crown 3 60 | 32.6 oz | Robic Nylon | Versatile backpacking |
| Osprey Exos Pro 55 | 34.6 oz | Robic Nylon | Hot-weather hiking |
| ULA Ultra Circuit SV 48 | 35.8 oz | Ultra 200X / Ultra400X | Section hikes |
| REI Flash 55 | 45 oz | Robic Nylon | Budget ultralight setup |
| Atom Packs Notch EP40 | 29.6 oz | EcoPack EPX | Fast and light trips |
| SWD Long Haul 50 | 30.2 oz | Ultra 200X | Four-season backpacking |
1. Hyperlite Mountain Gear Southwest 55 Backpack
The Hyperlite Mountain Gear Southwest 55 is a durable ultralight backpack designed for thru-hiking, wilderness trips, and extended backpacking adventures.
Made with Dyneema-based composite fabric, it combines high strength with low weight. The waterproof construction, roll-top closure, and reinforced external pockets make it suitable for demanding outdoor environments.
The backpack uses two aluminum frame stays that can be adjusted for a more personalized fit. This frame system helps transfer heavier loads toward the hips while maintaining a lightweight design.
Best for: Long-distance hikers who need durability and weather resistance.
Highlights:
- Lightweight Dyneema construction
- Waterproof roll-top design
- Adjustable aluminum frame stays
- Durable external storage pockets
2. Durston Kakwa 55 Backpack
The Durston Kakwa 55 is an ultralight backpack designed specifically for thru-hiking and multi-day backpacking.
Available in Ultra 200X and UltraGrid fabric options, the pack balances durability, weight savings, and performance. Its external pockets provide quick access to frequently used gear without opening the main compartment.
The standout feature is its efficient frame and suspension system, which helps transfer weight comfortably while maintaining a streamlined profile.
Best for: Backpackers looking for a lightweight pack with strong load support.
Highlights:
- Efficient suspension system
- Multiple external pockets
- Lightweight construction
- Designed for long-distance hiking
3. Gossamer Gear Gorilla 50 Backpack
The Gossamer Gear Gorilla 50 is a popular choice for hikers transitioning to lightweight backpacking.
With approximately 50 liters of storage, it provides enough space for multi-day trips while maintaining a low overall weight. The aluminum frame helps support heavier loads, while multiple pockets make gear organization simple.
The Robic nylon construction provides a good balance between durability and weight, making it suitable for regular trail use.
Best for: Lightweight backpackers who need versatility.
Highlights:
- Comfortable aluminum frame
- Large storage capacity
- Multiple external pockets
- Adjustable hip belt options
4. Zpacks Arc Haul Ultra 60 Backpack
The Zpacks Arc Haul Ultra 60 is one of the lightest framed backpacks in its class.
Weighing just over 20 ounces, it uses Ultra 100X fabric and features a suspended mesh back panel that improves airflow during hot-weather hiking.
The adjustable torso system allows users to customize the fit, while the lightweight frame provides support for approximately 25-30 pounds of gear.
The backpack also includes external water bottle pockets, front mesh storage, and attachment points for additional accessories.
Best for: Ultralight hikers who want maximum weight savings.
Highlights:
- Extremely lightweight design
- Ventilated back panel
- Adjustable torso system
- Excellent for warm-weather trips
5. Granite Gear Crown 3 60 Backpack
The Granite Gear Crown 3 60 is a lightweight roll-top backpack designed for thru-hiking, section hiking, and multi-day adventures.
Its modular design allows users to customize the backpack with optional components, including a removable top lid.
The adjustable hip belt improves fit, while compression straps help secure bulky equipment. The pack can also accommodate larger items such as bear canisters when needed.
Best for: Backpackers who want flexibility and customization.
Highlights:
- Adjustable hip belt
- Modular design
- Large capacity
- Good balance of weight and durability
6. Osprey Exos Pro 55 Backpack
The Osprey Exos Pro 55 is a lightweight version of the well-known Exos backpack series.
Designed for long-distance hikers, it features a ventilated mesh back panel, adjustable torso length, and a rigid frame system that provides strong support.
The removable top lid allows hikers to reduce weight when carrying less gear, making it adaptable for different trip styles.
The breathable design makes it especially suitable for warm and humid environments.
Best for: Backpackers who prioritize comfort and ventilation.
Highlights:
- Excellent airflow
- Adjustable suspension
- Removable top lid
- Comfortable for longer trips
7. ULA Ultra Circuit SV 48 Backpack
The ULA Ultra Circuit SV 48 is a lower-volume version of the popular Circuit backpack series.
Designed for shorter backpacking trips and lightweight thru-hiking, it provides enough storage for trips lasting several days while keeping weight manageable.
The pack features a roll-top closure, front mesh pocket, large side pockets, and hip belt storage. Ultra fabric options provide strong durability with excellent weather resistance.
Best for: Section hikers and lightweight backpackers.
Highlights:
- Lightweight Ultra fabric
- Comfortable frame system
- Excellent organization
- Suitable for 3-5 day trips
8. REI Flash 55 Backpack
The REI Flash 55 is an affordable ultralight-style backpack designed for hikers who want flexibility without a premium price.
The pack includes removable components that allow users to reduce weight and customize storage. The side water bottle pockets are designed for easier access while hiking.
With a roll-top design, front mesh pocket, and hip belt pockets, it provides many features commonly found on higher-priced ultralight backpacks.
Best for: Backpackers looking for value and customization.
Highlights:
- Affordable price
- Removable accessories
- Customizable setup
- Practical storage layout
9. Atom Packs Notch EP40 Backpack
The Atom Packs Notch EP40 is a lightweight backpack designed for fast hiking and minimalist overnight trips.
Made with EcoPack fabric, it provides a balance of durability, weather resistance, and low weight.
The backpack includes the standard ultralight layout with side bottle pockets, front mesh storage, and a roll-top closure. A removable hip belt allows additional customization.
Best for: Fast hikers and lightweight adventurers.
Highlights:
- EcoPack construction
- Lightweight frame
- External storage options
- Minimalist design
10. Superior Wilderness Designs Long Haul 50
The Superior Wilderness Designs Long Haul 50 is a versatile ultralight backpack designed for multi-season backpacking.
Its frame system combines aluminum stays and a foam back panel to provide support while maintaining a lightweight profile.
Made with Ultra 200X fabric, the backpack offers excellent strength and water resistance. Multiple attachment points allow hikers to customize the pack for different adventures.
Best for: Four-season backpacking and customizable setups.
Highlights:
- Durable Ultra fabric
- Lightweight frame system
- Multiple attachment points
- Supports heavier loads
How to Choose an Ultralight Backpack
1. Choose the Right Volume
Most framed ultralight backpacks fall between 40L and 60L.
A 40-50L backpack is usually enough for lightweight backpackers carrying compact gear.
A 55-60L backpack provides additional room for:
- Longer trips
- Cold-weather equipment
- More food and water
- Larger sleeping systems
The right capacity depends on your gear setup and trip length.
2. Consider Frame Support
A framed backpack is designed to carry heavier loads more comfortably.
Frame systems help:
- Transfer weight to the hips
- Improve stability
- Reduce shoulder pressure
For loads above 25 pounds, a quality frame can make a significant difference.
3. Understand Backpack Materials
Common ultralight backpack materials include:
Dyneema Composite Fabric (DCF)
Advantages:
- Extremely lightweight
- Highly water resistant
- Strong for its weight
Ultra Fabric
Advantages:
- Excellent abrasion resistance
- Lightweight
- Durable for demanding use
Nylon
Advantages:
- Affordable
- Reliable durability
- Widely available
Material choice depends on budget, hiking style, and expected conditions.
4. Waterproof Protection
Many ultralight backpacks use water-resistant fabrics, but seams, zippers, shoulder straps, and hip belts may still absorb moisture.
For wet environments, consider:
- Pack liners
- Waterproof stuff sacks
- Backpack covers
5. Roll Top vs Top Lid
Roll Top Backpacks
Advantages:
- Lower weight
- Simple design
- Flexible capacity
Top Lid Backpacks
Advantages:
- Easier access to small items
- Convenient for maps, gloves, and accessories
Some backpacks offer removable lids, providing the benefits of both designs.
Final Thoughts
Ultralight backpacks with frames provide an excellent balance between comfort, durability, and reduced pack weight.
For maximum weight savings, the Zpacks Arc Haul Ultra 60 and Hyperlite Mountain Gear Southwest 55 are excellent choices. Backpackers looking for comfort and versatility may prefer options like the Osprey Exos Pro 55 or Gossamer Gear Gorilla 50.
The best ultralight backpack depends on your hiking style, gear weight, trip length, and comfort preferences. Choosing the right pack can make long-distance adventures easier, lighter, and more enjoyable.
