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. 

• 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

Specifications