Best Ultralight Backpacks
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Nashville Pack and Equipment Company LLC The Cutaway 20 | 30 | 40

20 model: 14.4 oz; 30 model: 15.4 oz; 40 model: 16.5 oz (stock 18 in torso configuration)
25 L / 34 L / 43 L total internal at 18 in torso
Venom Gridstop ECO or Aluula Graflyte V98
Small: 28" - 38"
Medium: 32" - 42"
Large: 36" - 48"
Not specified — fewer seams are claimed, but seam taping is not
Lifetime
20 model: 14.4 oz; 30 model: 15.4 oz; 40 model: 16.5 oz (stock 18 in torso configuration)
25 L / 34 L / 43 L total internal at 18 in torso
Venom Gridstop ECO or Aluula Graflyte V98
Small: 28" - 38"
Medium: 32" - 42"
Large: 36" - 48"
Not specified — fewer seams are claimed, but seam taping is not
Lifetime
GOODS
- Exceptionally comfortable for long-distance wear
- Easy access to gear with well-designed pockets
BADS
- Water resistance is lacking compared to other packs
Compare this product with...
ULA Equipment ULA Circuit Backpack

38.5 oz
68 L total
ULA 400 Robic nylon with UltraStretch mesh
Removable & Height Adjustable Pass-through Hipbelt
No — seams are not taped
Lifetime
38.5 oz
68 L total
ULA 400 Robic nylon with UltraStretch mesh
Removable & Height Adjustable Pass-through Hipbelt
No — seams are not taped
Lifetime
GOODS
- Exceptionally lightweight without sacrificing durability
- Comfortable and adjustable fit for long-distance hiking
BADS
- Ventilation could be improved for hot weather
Compare this product with...
Pa’lante V2

Gridstop: 17.7 oz / 18.6 oz
Ultraweave: 18.1 oz / 18.7 oz
31 L (16 in); 37 L (19 in) internal
210D UHMWPE Gridstop or Ultraweave 200X; 210D UHMWPE grid-mesh pockets
Stashable hipbelt with garage within side pocket
No — sewn-bound seams, not seam-taped
2 Years for manufacturing defects (packs purchased within the past 2 Years)
Gridstop: 17.7 oz / 18.6 oz
Ultraweave: 18.1 oz / 18.7 oz
31 L (16 in); 37 L (19 in) internal
210D UHMWPE Gridstop or Ultraweave 200X; 210D UHMWPE grid-mesh pockets
Stashable hipbelt with garage within side pocket
No — sewn-bound seams, not seam-taped
2 Years for manufacturing defects (packs purchased within the past 2 Years)
GOODS
- Exceptionally lightweight without sacrificing durability
- Comfortable for long-distance hiking and thru-hiking
BADS
- Ventilation could be improved for hot weather
- Water resistance is not the strongest in heavy rain
Compare this product with...
Black Diamond Beta Light 45 Pack

23.6 oz
45 L
Challenge Sailcloth Ultra 200 PE with 100D nylon ripstop accents
Removable
Yes — taped seams
Practical Lifetime
23.6 oz
45 L
Challenge Sailcloth Ultra 200 PE with 100D nylon ripstop accents
Removable
Yes — taped seams
Practical Lifetime
GOODS
- Exceptionally durable for an ultralight pack, handling rough terrain and heavy loads without issue
- Comfortable for long-distance hiking, with a well-padded hip belt and shoulder straps
BADS
- Limited accessibility, with fewer pockets and a narrower opening compared to other packs
- Ventilation could be better, leading to a sweaty back on hot days
Compare this product with...
Zpacks Arc Haul Ultralight Backpack

21.4 oz
60 L
Ultra 100X
Yes — padded, removable, and interchangeable
Yes — taped seams
2 Years
21.4 oz
60 L
Ultra 100X
Yes — padded, removable, and interchangeable
Yes — taped seams
2 Years
GOODS
- Exceptionally lightweight without sacrificing durability, making it ideal for long-distance hikes
- Comfortable and well-ventilated, reducing sweat and discomfort on extended trips
BADS
- Higher price point compared to other backpacks in its category
Compare this product with...
Gossamer Gear Mariposa 60 Backpack

33.4 oz
60 L
100D and 210D recycled Robic nylon
Small pack: S/M Curved belt
Medium/Large pack: M Straight Belt
No — seams are not factory sealed
Lifetime
33.4 oz
60 L
100D and 210D recycled Robic nylon
Small pack: S/M Curved belt
Medium/Large pack: M Straight Belt
No — seams are not factory sealed
Lifetime
GOODS
- Exceptionally lightweight without sacrificing durability
- Comfortable for long-distance hiking and thru-hiking
BADS
- Ventilation could be improved for hot weather
- Water resistance is not the strongest
Compare this product with...
Hyperlite Mountain Gear Unbound 40

28.5 oz
40 L; 9 L external pocket volume
Dyneema Composite Hybrid 3.8 (white); 5.1 with 5.9 reinforcement (black)
Yes — removable padded hip belt with pockets
Yes — seam-taped
Manufacturing defects: unspecified duration; 30 days for returns/refunds
28.5 oz
40 L; 9 L external pocket volume
Dyneema Composite Hybrid 3.8 (white); 5.1 with 5.9 reinforcement (black)
Yes — removable padded hip belt with pockets
Yes — seam-taped
Manufacturing defects: unspecified duration; 30 days for returns/refunds
GOODS
- Exceptionally lightweight without sacrificing durability
- Comfortable for long-distance hiking
BADS
- Ventilation could be better for hot climates
- Fit may not suit all body types
Compare this product with...
Gossamer Gear Gorilla 50 Ultralight Backpack

31.2 oz
50 L total; 32 L medium main body
70D and 100D recycled Robic nylon
S/M Curved (Small) M Straight (Medium/Large)
No — seams are not weather-sealed
Lifetime
31.2 oz
50 L total; 32 L medium main body
70D and 100D recycled Robic nylon
S/M Curved (Small) M Straight (Medium/Large)
No — seams are not weather-sealed
Lifetime
GOODS
- Exceptionally comfortable for long-distance wear
- Easy access to gear with well-placed pockets
BADS
- Water resistance is lacking compared to other packs
- Ventilation could be better for hot climates
Compare this product with...
Outdoor Vitals CS40 Ultra Backpack

27 oz (size M torso with M hip belt)
51 L total (S); 53 L total (M/L)
Challenge UltraWeave 200 UHMWPE/polyester blend
Full size fully padded load-bearing hip belt
No — sewn seams are not seam-taped
Performance Promise (see Warranty Info)
27 oz (size M torso with M hip belt)
51 L total (S); 53 L total (M/L)
Challenge UltraWeave 200 UHMWPE/polyester blend
Full size fully padded load-bearing hip belt
No — sewn seams are not seam-taped
Performance Promise (see Warranty Info)
GOODS
- Exceptionally lightweight without sacrificing durability
- Comfortable for long-distance hiking
BADS
- Ventilation could be better for hot climates
- Fit may not suit all body types
Compare this product with...
Durston Kakwa 55

Ultra 200X: 30.1 oz (S), 31.5 oz (M), 32.4 oz (L); UltraGrid: 29.2 oz (S), 30.6 oz (M), 31.3 oz (L)
55 L
Ultra 200X or UltraGrid
Dual strap design with reverse pull 2:1 leverage for easy tightening; redesigned for 2026 with lumbar pad and improved durability
No — not factory seam-taped; optional user seam sealing
Lifetime
Ultra 200X: 30.1 oz (S), 31.5 oz (M), 32.4 oz (L); UltraGrid: 29.2 oz (S), 30.6 oz (M), 31.3 oz (L)
55 L
Ultra 200X or UltraGrid
Dual strap design with reverse pull 2:1 leverage for easy tightening; redesigned for 2026 with lumbar pad and improved durability
No — not factory seam-taped; optional user seam sealing
Lifetime
GOODS
- Exceptionally comfortable for long-distance wear
- Durable construction holds up under heavy use
BADS
- Poor ventilation can make your back sweaty
- Water resistance is lacking in heavy rain
Compare this product with...
Hyperlite Mountain Gear Hyperlite Southwest 55 Pack

31.8 oz
55 L
200D Dyneema Woven Composite 3.9
Yes
Yes — seam-sealed
Lifetime
31.8 oz
55 L
200D Dyneema Woven Composite 3.9
Yes
Yes — seam-sealed
Lifetime
GOODS
- Exceptionally lightweight without sacrificing durability, making it ideal for long-distance hiking.
- Highly water-resistant, providing reliable protection in wet conditions.
BADS
- Ventilation could be improved, as it may feel less breathable on hot days.
Compare this product with...
Osprey Exos Pro 55 Backpack

33.2 oz
55 L (S/M); 58 L (L/XL)
NanoFly 100D nylon with 200D UHMWPE ripstop
Yes — ExoForm EVA-foam padded hip belt with dynamic stretch
Not specified by manufacturer
Lifetime
33.2 oz
55 L (S/M); 58 L (L/XL)
NanoFly 100D nylon with 200D UHMWPE ripstop
Yes — ExoForm EVA-foam padded hip belt with dynamic stretch
Not specified by manufacturer
Lifetime
GOODS
- Super light, making it ideal for long-distance hiking
- Excellent ventilation, keeping you cool on the trail
BADS
- Limited accessibility to main compartment
- Lacks drainage holes in exterior pockets
Compare this product with...
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Conclusion & Final Verdict:
Choose The Cutaway 20 | 30 | 40 for the guide’s highest comfort and accessibility ratings. Choose the ULA Circuit Backpack when durability, fit, and comfort outweigh ventilation, or the Zpacks Arc Haul Ultralight Backpack when ventilation and water resistance matter more. The Osprey Exos Pro 55 Backpack is the airflow-led option, while the Kakwa 55 and Mariposa 60 Backpack are comfort-focused alternatives with weaker wet-weather scores. Match capacity and hip-belt sizing to your load and body before deciding.
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Most Useful Comparisons
Compare the closest-rated products and other matchups that have helped readers make a decision.
Black Diamond Beta Light 45 PackvsPa’lante V2
The Black Diamond Beta Light 45 Pack excels in durability and water resistance, ideal for rugged terrain and wet conditions. The Pa’lante V2 offers superior comfort and accessibility, making it perfect for long-distance hikers prioritizing convenience.
Durston Kakwa 55vsHyperlite Mountain Gear Hyperlite Southwest 55 Pack
The Durston Kakwa 55 excels in comfort and accessibility, making it ideal for thru-hikers, while the Hyperlite Southwest 55 Pack offers superior water resistance and durability for wet conditions. Choose the Kakwa 55 for long-distance comfort or the Hyperlite Southwest 55 for rugged, weather-resistant performance.
Durston Kakwa 55vsOutdoor Vitals CS40 Ultra Backpack
The Durston Kakwa 55 excels in comfort for thru-hiking, while the Outdoor Vitals CS40 Ultra offers better ventilation and water resistance. Choose the Kakwa 55 for long-distance comfort or the CS40 Ultra for balanced durability and weather resistance.
Gossamer Gear Gorilla 50 Ultralight BackpackvsOutdoor Vitals CS40 Ultra Backpack
The Gorilla 50 shines in comfort and pocket access, while the Outdoor Vitals CS40 Ultra is lighter, more durable and better at keeping water out. Choose the Gorilla for long‑day comfort, the CS40 for weight‑critical, weather‑resistant adventures.
Gossamer Gear Mariposa 60 BackpackvsHyperlite Mountain Gear Unbound 40
The Gossamer Gear Mariposa 60 excels in durability and fit, ideal for rugged trails, while the Hyperlite Mountain Gear Unbound 40 offers superior accessibility and water resistance, perfect for organized hikers. Choose based on your priority: durability or accessibility.
Hyperlite Mountain Gear Hyperlite Southwest 55 PackvsOsprey Exos Pro 55 Backpack
The Hyperlite Southwest 55 Pack excels in durability and water resistance, ideal for rugged conditions, while the Osprey Exos Pro 55 Backpack offers superior ventilation and fit, making it better for comfort on long hikes.
Hyperlite Mountain Gear Unbound 40vsGossamer Gear Gorilla 50 Ultralight Backpack
The Hyperlite Mountain Gear Unbound 40 excels in durability and water resistance, while the Gossamer Gear Gorilla 50 offers superior comfort and fit. Choose the Unbound 40 for rugged conditions and the Gorilla 50 for long-distance comfort.
Nashville Pack and Equipment Company LLC The Cutaway 20 | 30 | 40vsULA Equipment ULA Circuit Backpack
The Nashville Pack and Equipment Company LLC The Cutaway excels in comfort and accessibility, ideal for hikers prioritizing all-day wear and easy gear access. The ULA Equipment ULA Circuit offers superior durability and fit, making it a better choice for those needing a robust, adjustable pack.
ULA Equipment ULA Circuit BackpackvsPa’lante V2
The ULA Circuit Backpack excels in fit and durability, making it ideal for hikers needing a stable, comfortable carry. The Pa’lante V2, while slightly less durable, offers better ventilation and accessibility, suiting those prioritizing comfort and ease of access.
Zpacks Arc Haul Ultralight BackpackvsBlack Diamond Beta Light 45 Pack
The Zpacks Arc Haul is 2.2 oz lighter, offers 60 L capacity and superior ventilation and water‑proofing, making it ideal for long‑haul, wet‑weather hikers, while the Black Diamond Beta Light 45 trades a few ounces for tougher, lifetime‑warrantied construction that suits rugged, heavy‑load trekking.
Zpacks Arc Haul Ultralight BackpackvsGossamer Gear Mariposa 60 Backpack
The Zpacks Arc Haul is dramatically lighter (21 oz) and far more water‑resistant, while the Gossamer Mariposa offers superior comfort, durability, and a lifetime warranty. Choose the Arc Haul for ultra‑light, wet‑weather trekking; pick the Mariposa if comfort and long‑term durability matter most.
How We Rated These Products
How well the pack resists wear, abrasion, and damage during heavy use across varied terrain and conditions.
How well the pack distributes weight and feels against the body during extended wear, including shoulder strap and hip belt performance.
How well the pack conforms to the wearer’s torso and body shape for stable, balanced carrying without shifting.
How easily and quickly gear can be reached or stored while wearing the pack, including pocket design and closure systems.
How well the back panel and straps allow airflow to reduce heat and sweat buildup during active use.
How effectively the pack keeps contents dry in rain or wet conditions, including fabric treatment and seam sealing.