TheUNUS52is an ultralight backpack designed for hiking and trekking, weighing only740g. It features a42L main compartmentwith an additional10L of external expansion, making it ideal forlightweight travelers on 3 to 7-day journeys.
Core Fabrics
UltraWeave™ / UltraStretch™
Ultra™200X (Main Fabric):Made fromUHMWPE fibers(similar to Dyneema), it is several times stronger than traditional nylon. Constructed with athree-layer composite structure(X-ply yarn + waterproof film), it offerslightweight durability, abrasion resistance, and tear resistance.
Ultra™400X (Reinforced Base):Provides enhancedabrasion resistance, designed to withstand prolonged ground dragging and friction against rocks.
UltraStretch™:A blend ofUHMWPE fibers and Nylon 66, deliveringhigh elasticity and durability.
Ergonomic Design | Comfort & Stability
The Ultralight Composite Frame Systemfeatures 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 Paddingin the shoulder straps and hip belt for enhanced comfort and weight distribution.
Elastic Shoulder Strap Pocketsfor quick access to a water bottle without removing the backpack.
X-shaped Hip Beltwith anadjustable angle, ensuring a secure fit across different body types.
Multi-Functional Attachment & Storage System
UHMWPE Reflective Daisy Chain (Front Sides):Compatible with theAC-K03 bungee cordto secure trekking poles, umbrellas, ice axes, and other gear. The reflective feature enhancesvisibility and safety at night.
UltraStretch™ Fabric Storage (Sides & Front): Convenient for storingrain jackets, insulation layers, water bottles, headlamps, and other frequently used items.
Y-Strap Top Compression System:Secures items at the top of the packwith adetachable 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.
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.
We ship to most countries from Hong Kong using Fedex / S.F. Express. For Oversea orders usually arrive around a week. You will be able to see the shipping rate at check out page. Please contact us if you have any questions.