SKU: 72921534840

UNUS52 | BACKPACK

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Description

UNUS52 | BACKPACKThe UNUS52 is an ultralight backpack designed for hiking and trekking, weighing only 740g. It features a 42L main compartment with an additional 10L of external expansion, making it ideal for lightweight travelers on 3 to 7 day journeys. Core Fabrics UltraWeave UltraStretch Ultra200X (Main Fabric): Made from UHMWPE fibers (similar to Dyneema), it is several times stronger than traditional nylon. Constructed with a three layer composite structure (X

The UNUS52 is an ultralight backpack designed for hiking and trekking, weighing only 740g. It features a 42L main compartment with an additional 10L of external expansion, making it ideal for lightweight travelers on 3 to 7-day journeys.

Core Fabrics

UltraWeave™ / UltraStretch™

  • Ultra™200X (Main Fabric): Made from UHMWPE fibers (similar to Dyneema), it is several times stronger than traditional nylon. Constructed with a three-layer composite structure (X-ply yarn + waterproof film), it offers lightweight durability, abrasion resistance, and tear resistance.
  • Ultra™400X (Reinforced Base): Provides enhanced abrasion resistance, designed to withstand prolonged ground dragging and friction against rocks.
  • UltraStretch™: A blend of UHMWPE fibers and Nylon 66, delivering high elasticity and durability.

Ergonomic Design | Comfort & Stability

  • The Ultralight Composite Frame System features a dual-track aluminum alloy tube frame (22g each) for a lightweight yet sturdy structure. A carbon fiber rod enhances back panel stability, with adjustable height via the shoulder straps for an optimal fit—perfect for long-distance trekking.
  • EVA High-Support Foam Padding in the shoulder straps and hip belt for enhanced comfort and weight distribution.
  • Elastic Shoulder Strap Pockets for quick access to a water bottle without removing the backpack.
  • X-shaped Hip Belt with an adjustable angle, ensuring a secure fit across different body types. 

 

Multi-Functional Attachment & Storage System
  • UHMWPE Reflective Daisy Chain (Front Sides): Compatible with the AC-K03 bungee cord to secure trekking poles, umbrellas, ice axes, and other gear. The reflective feature enhances visibility and safety at night.
  • UltraStretch™ Fabric Storage (Sides & Front): Convenient for storing rain jackets, insulation layers, water bottles, headlamps, and other frequently used items.
  • Y-Strap Top Compression System: Secures items at the top of the pack with a detachable loop to prevent slipping.

 

Optional Accessories

  • AC-B01 – Detachable Hip Belt Pocket
  • AC-K03 – Elastic Cord Attachment

 

Key Features Summary

  • Total Weight: 740g
  • Constructed with UltraWeave™ / UltraStretch™ Fabrics
  • Adjustable Ultralight Frame System
  • Reflective Daisy Chain 
  • Top Y-Strap Compression System
  • Quick-Access Chest Water Bottle Pocket
  • X-Shaped Waist Belt Buckle
  • Ice Axe Loop

UltraWeave™ Care Instructions
Hand wash only: Do not machine wash UltraWeave fabric. For cleaning, try to wipe off dirt with a towel as much as possible before hand washing.

Specifications

Material | Material Info

Main Fabric: Ultra™200X in Gravel Grey

Bottom: Ultra™400X in Black

Pockets: UltraStretch™ / Nylon Spandex

Shoulder straps & Hip Belt:  210D Nylon with UHMWPE ripstop

Cord:UMHWPE+3M reflective yarn

Webbing:100% Nylon

Frame Material

Carbon Fiber Stay + Aluminum Alloy Tube

Capacity

 


Main Compartment: 42L

Side Pockets: 2x2L

Center Pocket: 6L

 

 Total weight

740g / 26oz

Dimensions


Unpack Hight: 85cm

Width: 29cm

Depth: 18.5cm

Top circumference: 98cm

Bottom circumference: 83cm

size

Straps: 

S/M - 15.5 inch / 39.5 cm (Torse<43cm)

L/XL - 17 inch / 43.5 cm (Torse>40cm)

Torso: 15"~ 20" / 37cm~51cm

HIp Belt: 28"~ 40" / 72cm~102cm

Recommended Comfortable Load

12kg / 26.4lbs


Maximum Recommended Load

18kg / 40lbs

 

Size chart


Unit:inch / cm
Straps(1) Straps(2)

Recommended Torso Length


15"/37 ~ 17"/43

16"/40 ~ 20"/51

Shoulder Straps

Length

15.5"/39.5
 17"/43.5

 

A 160cm tall model uses a 15.5-inch shoulder straps.

A 168cm tall model uses a 17-inch shoulder straps.

A 188cm tall model uses a 17-inch shoulder straps.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 72921534840

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no body!
New York, US
★★★★★ 5
Perfect fit
Size: Large, Color: (100) White / White / Black
Durable and comfortable. Size works well. Very soft with nice thickness for training. Fairly long lasting
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Reviewed in the United States on February 12, 2026
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Carnegie, US
★★★★★ 5
Post-COVID Sock Hunt: Finally a Win
Size: Medium, Color: (001) Black / Black / White
Ever since COVID, I haven’t been able to find a pair of socks that hold up for more than a few months. Brands like UA, Adidas, and others seem to have cut corners—likely in response to inflation—by downgrading materials and labor rather than raising prices. The result? Socks that wear thin, rip easily, or lose shape fast. These, however, have been a pleasant surprise. I’ve been wearing them for a few weeks and so far, they’re holding strong. You can tell some cost-saving measures were still made—certain areas feel slightly thinner—but overall, the construction is solid. A key win: they stay on. These are ankle socks (not “no-shows”), and they hug the ankle securely. That’s a huge plus in a world where most post-COVID no-shows slide off halfway through the day. We may never get back to the pre-COVID quality standards without paying a premium, but for now, these are a reliable choice. Ratings: • No slipping: 10/10 • Price: 7/10 • Durability (so far): No pilling or loose threads — promising start.
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Reviewed in the United States on March 24, 2025
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Amazon Customer
Alexandria, US
★★★★★ 5
Great Quality and Stylish
Size: Large, Color: (001) Black / Black / White
Exactly what I was looking for. I don’t like socks that are no-show that your ankles rub on the shoe. These are taller than that but shorter than socks that go up and over the ankle. They’re comfortable, good quality, and pretty thick. They’re form fitting m, but not compression. I dint like compression socks, and these are tight, but not too tight.
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Reviewed in the United States on June 5, 2025
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Eric
Waukegan, US
★★★★★ 5
Affordable and good quality socks
Size: Medium, Color: (001) Black / Black / White
Good quality!
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Reviewed in the United States on May 9, 2026
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Thomas Boelter
Birmingham, US
★★★★★ 4
Socks
Size: Large, Color: (001) Black / Black / White
They are very comfortable and fit just right
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Reviewed in the United States on September 3, 2025

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