Arc'teryx Aerios 18 Backpack

Arc'teryx Aerios 18 Backpack is a streamlined yet hard-wearing backpack that keeps trail essentials neatly arranged without weighing the carry down. Designed for day hikes and fast-paced thru-hike days, it combines a breathable back panel with a supportive frame sheet to stay comfortable over long distances. Smart pocketing puts small items within quick reach, while external bungee and attachment points expand carry options for poles and extra layers. A hydration-ready main compartment makes it easy to run a drinking tube outside the pack for on-the-move sipping.

• Lightweight, abrasion-resistant 18 L trail backpack built with Hadron LCP grid fabric for durable performance
• Interchangeable harness system with adjustable shoulder straps and hipbelt options for a more dialed-in carry
• Highly breathable AeroForm back panel with an anti-barreling frame sheet for steadier comfort on the move
• Hydration-system ready main compartment with a clip and tube port for routing a reservoir hose
• Two zippered shoulder strap pockets sized to hold 500 ml soft flasks or small devices
• Patent-pending two-point harness adjustment to fine-tune fit and pocket placement from top and bottom
• Adjustable dual-point sternum strap and removable waist belt for stability when the trail gets rough
• Two side pockets with a fast closure system for quick access storage
• Dual trekking pole attachment points plus a front bungee compression system and webbing daisy chain for external carry
• Top pocket and internal security pocket with key clip for organizing small valuables
• Fluorocarbon free DWR finish with PFAS-compliant construction plus recycled content and Bluesign approved materials

Weight
575 g (size Regular)

Dimensions
Length: 49 cm
Width: 24 cm
Depth: 19 cm
Volume: 18 L

Materials
Primary fabric: 94% nylon, 6% polyacrylate
Secondary fabric: 72% nylon, 28% elastane
Tertiary fabric and lining: 100% polyester
Padding: 100% polyethylene (foam)