If you’re looking for the best backpacks for hiking, comfort and weight are two of the most important factors. The best ultralight backpacks can make long days on the trail feel lighter, while a poorly designed one will leave you sore and exhausted. Trust us, your hips will start to feel the load after day one if your pack is not packed right. That’s why we love lightweight backpacks for multi day hikes. They are designed to balance durability with streamlined features, making them perfect for hikers who want to cover more miles with less effort. Win-win.
While we like 60L backpacks are ideal for long term travel or longer journeys, as they offer generous space for gear, sleeping systems, and food without overloading your body, a larger pack can evidently mean more weight. But thanks to modern suspension systems and clever design, you don’t have to compromise on support just because you’ve gone lighter with more capacity. Many of today’s lightweight packs also integrate breathable back panels and smart hipbelt systems to keep you moving in comfort.
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The Best Ultralight Backpacks for Trekking at a Glance
- Best Overall: Osprey Exos 48 – Excellent balance of weight, comfort, and reliability for multi-day treks.
- Runner-up: Osprey Exos Pro 55 – Incredibly light with streamlined features and great ventilation.
- Best Women’s Backpack: Osprey Eja 58 – Tailored fit and ultralight performance designed specifically for women.
- Best Compact Trekking Pack: Gregory Zulu 40 – Breathable, supportive, and perfect for weekend trips.
- Best Waterproof Design Pack: Black Diamond Beta Light 45 – Minimalist, weatherproof design with running-vest style harness.
- Best Durable Backpack: Rab Muon 40 – Ultralight but built tough with Spectra ripstop for demanding thru-hikes.
- Best for Load Stability: Osprey Atmos AG LT 65 – Anti-Gravity suspension and customizable fit for superior comfort under heavy loads.
That said, bigger isn’t always better. If your treks are shorter or you’ve honed your packing list to the essentials, a 40L backpack or even 50L pack may be the sweet spot. These smaller models offer excellent load stability and often come in at under 3 lbs, making them ideal for weekend adventures or minimalist thru-hiking.
Whether you need a pack that can hold your full camping kit or something sleeker for fast-and-light hikes, we’ve rounded up the best lightweight backpacks for hiking and camping. All of these models are built by trusted brands, field-tested for stability and comfort, and designed to go the distance.
Best Ultralight Backpacks for Multi-Day Hikes
If you are looking for an excellent all-round trekking backpack then the Osprey Exos 48 is a trusted ultralight pack designed for backpackers who want to shed weight without sacrificing comfort. Its AirSpeed suspension system uses an injection-molded ladder adjustment for a precise fit and outstanding ventilation, while durable main body fabrics and reinforced mesh add reliability on rugged trails. The removable floating lid, dual hipbelt pockets, and hydration sleeve make it versatile for both minimalist and extended trips.
At just 2.77 lbs, the Exos 48 balances light weight with functionality. Its streamlined design provides easy access and stable carry, making it a great choice for thru-hikers or anyone chasing miles with a simple but dependable pack.
Key Specs
Volume 48L
Weight 2.77 lbs
Back system Adjustable AirSpeed suspension
Access Top with removable floating lid
Pockets Hipbelt pockets, front stretch mesh, under-lid zip
Hydration Internal sleeve with hose port
Dimensions 29.5 x 14.2 x 11.8 in
The Exos Pro 55 takes Osprey’s ultralight ethos even further, delivering a streamlined, highly ventilated pack for weight-conscious adventurers. The AirSpeed mesh backpanel keeps loads off your back for maximum airflow, while compression straps and a removable lid provide flexible volume adjustment. A large front compression pocket and side stretch panels offer plenty of storage for overflow gear.
Weighing just over 2 lbs, the Exos Pro 55 is one of the lightest packs in its class, yet it still provides a secure, comfortable carry for multi-day trips. With the FlapJacket weather cover in place, it stays protective even when the lid is removed, making it a versatile option for ultralight backpacking.
Key Specs
Volume 55L
Weight 2.08 lbs
Back system AirSpeed suspension
Access Top with removable lid + FlapJacket cover
Pockets Large front compression, stretch side, hipbelt pockets
Hydration Internal sleeve with Hydraclip hanger
Dimensions 28.3 x 12.2 x 3.1 in
The Eja 58 is Osprey’s women’s-specific ultralight backpack, built with the same reliable design as the Exos but tailored for female adventurers. The AirSpeed suspension system delivers ventilated support, while the adjustable ladder system allows 4 inches of torso fit customization. Dual hipbelt pockets, a hydration sleeve, and a removable floating lid add functional versatility for long days on the trail.
Durable fabrics reinforce the pack where it matters most, giving the Eja dependable strength without excessive weight. At just 2.72 lbs, it’s a go-to pack for women seeking a balance of comfort, simplicity, and ultralight efficiency on multi-day hikes.
Key Specs
Volume 58L
Weight 2.72 lbs
Back system Adjustable AirSpeed suspension
Access Top with removable floating lid
Pockets Hipbelt pockets, under-lid zip, front mesh stash
Hydration Internal sleeve with hose port
Dimensions 28 x 14.6 x 13 inches
The Gregory Zulu 45L is a versatile pack designed for comfort and adaptability on shorter treks and weekend adventures. Its FreeFloat suspension system combines breathable mesh with dynamic movement, while the 3D Comfort Cradle harness wraps the body for a secure, balanced fit. A front stretch mesh pocket offers quick storage, and the integrated rain cover ensures your gear stays dry when storms roll in.
With 45 liters of space, the Zulu is compact yet capable, offering a stable and supportive carry with excellent ventilation. It’s a great choice for hikers who want a pack that feels as good on the trail as it does at the end of the day. It may be one of the heavier picks on the list, but would still qualify as a lightweight pack, great for long term travel.
Key Specs
Volume 45L
Weight: 3lbs
Back system FreeFloat suspension with torso adjustment
Access Top and front zip
Pockets Front stretch mesh, dual side pockets, hipbelt storage
Rain cover Included
Dimensions not specified
The Beta Light 45 from Black Diamond combines ultralight construction with a running vest-inspired harness for dynamic, close-to-body stability. The roll-top closure, taped seams, and waterproof fabric create a weatherproof main compartment, while oversized side and stretch mesh pockets provide quick-access storage. A removable frame pad and detachable hipbelt let you tailor the pack for fast-and-light missions.
Minimal yet functional, this 45L pack offers protection from the elements without unnecessary weight. It’s designed for high-output adventures where mobility, simplicity, and waterproof performance are key.
Key Specs
Volume 45L
Weight not specified (~2 lbs est.)
Back system Running vest-style harness with removable frame pad
Access Roll-top closure
Pockets Stretch outer mesh, dual oversized side pockets
Hipbelt Removable
Materials Waterproof fabric with taped seams
The Rab Muon 40 is an ultralight trekking pack built for fast-moving hikers and thru-hikers covering long distances. Its Tri-Flex carry system features a wraparound harness, shaped lumbar pad, and supportive hipbelt for stability and comfort over big days. The Spectra ripstop fabric — 15 times stronger than steel by weight — is combined with Cordura and Hydroshield for exceptional durability and weather protection.
Weighing just 2 lbs 2 oz, the Muon still delivers plenty of features: a hydration-compatible sleeve, removable lid with drawstring closure, multiple zippered pockets, and compression straps for extra gear. Tough, lightweight, and trail-ready, it’s made for hikers who want minimal weight without compromise.
Key Specs
Volume 40L (3050 cu in)
Weight 2 lbs 2 oz
Back system Tri-Flex harness with lumbar pad
Access Top with removable lid and drawstring closure
Pockets Two side, two harness, one large front stash
Hydration 3L reservoir compatible
Materials 100D recycled high-tenacity nylon with Spectra ripstop, Hydroshield finish
Dimensions 25.6 x 13 x 11.8 in
The Atmos AG LT 65 is Osprey’s streamlined version of its iconic anti-gravity pack, designed for comfort under heavy loads. Its Fit-on-the-Fly hipbelt and torso adjustment system provide a customized fit, while the tensioned backpanel distributes weight evenly across the body. A reinforced front shove-it pocket and integrated rain cover add practicality for unpredictable conditions.
At just over 4 lbs, the Atmos AG LT is lighter than previous versions while retaining its legendary stability and support. With 65 liters of capacity, it’s built for extended trips, expedition-style travel, and backpackers who prioritize comfort even with bigger base weights.
Key Specs
Volume 65L
Weight 4.24 lbs
Back system Anti-Gravity LT suspension with torso adjustment
Access Top, bottom, and side
Pockets Hipbelt pockets, front shove-it, dual side mesh
Rain cover Included
Dimensions 35.4 x 15.4 x 12.6 in
How to Choose the Right Lightweight Backpack
With so many lightweight trekking packs on the market, choosing the right one can feel overwhelming. The best place to start is by deciding on capacity. If you already own a backpack, use its size as a reference point. For summer treks, you can get away with smaller capacities, but for winter outings you’ll need extra room for bulkier layers and gear. Think about how many days of food you’ll carry too—three, five, or more—and size up accordingly.
Equally important is the back system. Some ultralight packs don’t have frames at all, which saves weight but limits how much you can comfortably carry. These models work best with smaller loads and require careful packing to avoid lumps pressing into your back. Packs with a frame, however, distribute weight more effectively through the hipbelt, which takes the strain off your shoulders. Foam back panels offer a middle ground, adding some stiffness while still staying lightweight.
One thing to note is the lighter the backpack the more concessions will be made the frame so it may not have as good a structure, which can make it seem heavier. Thats why we love the Osprey Exos.
When it comes to hipbelts, we recommend going padded if you’re carrying more than a minimalist load. Even with ultralight gear, a supportive hipbelt makes a world of difference by shifting the weight onto your hips, where your body can handle it best. Features like hipbelt pockets, external mesh sleeves, hydration compatibility, and removable lids all come down to personal preference—but can make life on the trail a lot easier.
What Feautures to Look for in a Ultralight Backpack
While it’s tempting to be drawn to flashy extras, the truth is that thoughtful design matters more than gimmicks. Hipbelt pockets can be a real lifesaver when you need quick access to snacks or a GPS. External mesh pockets are perfect for stashing a wet rain jacket or tent fly without soaking the rest of your gear. Hydration sleeves with tube ports are almost essential if you like to sip water on the move, and compression straps will help keep the pack balanced no matter how much or little you’re carrying.
For those who love extra organisation, a lid with multiple zippered compartments can help keep essentials separate. That said, many lightweight packs opt for roll-top closures to save weight—and a well-designed roll-top can be just as weather-resistant. Ultimately, the best women’s backpacks and men’s models alike balance essential features with simplicity, avoiding unnecessary add-ons that only weigh you down.
Tips for Packing Lightweight on a Multi-Day Hike
Even the best lightweight backpack won’t feel featherlight if you overload it. A big part of trekking comfortably is learning how to keep your kit as streamlined as possible. We’ve picked up a few tricks over the years that make a real difference on long-distance treks and wild camps.
One of our favourite hacks is using a sleeping bag liner inside a three-season bag instead of carrying a bulky winter bag. We learned this the hard way—hauling a heavy winter sleeping bag across 54 km of Dartmoor National Park, England on a cold weekend. It was warm, yes, but painfully unnecessary weight. Since then, we’ve always chosen a lighter bag and liner combination, which keeps us just as warm and saves a lot of bulk.
The same principle applies to the rest of your kit. Choose a compact, lightweight tent instead of a heavy double-walled option. Pack dehydrated meals or noodles rather than cans and heavy fresh food. When it comes to clothing, layering thin thermals and lightweight shells is far more efficient than carrying thick sweaters or multiple bulky jackets. Every item you swap for a lighter alternative adds up, making your pack easier to carry and your hike far more enjoyable.
FAQs: Best Ultralight Backpacks for Trekking
For multi-day hikes, a 50–65L pack is a reliable choice, offering space for sleeping gear, tent, food, and clothing. For weekend trips or minimalist trekking, 40–45L packs are ideal. We would suggest taking a 45-50L for a multi-day trek, however for a day hike a 40L backpack would be suitable. You can also benefit from using a 40L backpack if your setup is extremely lightweight and you are exploring in warmer months.
Yes. Many of the latest models use advanced fabrics like ripstop nylon, Cordura, and Spectra, which are designed to be both strong and light. Reinforced panels add protection in high-wear areas.
Absolutely. Many lightweight backpacks are versatile enough to handle both. Packs around 40L are especially useful for air travel, as they often fit carry-on dimensions while still carrying all your gear.
Packs like the Osprey Eja 58 are specifically designed with women’s body shapes in mind, featuring narrower shoulder straps, contoured hipbelts, and torso lengths that provide a more tailored fit. The best women’s backpacks will always prioritize comfort and ergonomics without sacrificing performance.
At Barefoot Backpackers, we’re passionate about helping you navigate the world with purpose. Our site is a hub for holistic health, conscious travel tips, and sustainable living advice. With every guide, we aim to help you create meaningful adventures while staying true to your values. Our content always comes from real experiences and knowledge that is truly aligned with us.
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