The larger volume Altra packs (Altra 62 through 85) have a Load Transfer Disc™ that pivots to increase agility and stability on rough terrain and combine the C2 (Composite Construction) suspension with Gridlock™ shoulder straps that adjust for custom fit. The smaller volume Altra packs, (Altra 33 through 50) keep weight to a minimum by using the efficient C2 (Composite Construction) system.
Pack Body: 210D nylon 6,6 ripstop is a high density single ripstop fabric coated with silicone to shed moisture and increase waterproofness. Used in the body for its light weight, the textile’s construction is a balanced weave that is durable and tear-resistant. Reinforced in the high wear areas with extremely durable 500D ATY nylon 6,6 silicone treated PU fabric that resists dirt, snow and water pick-up.
Collar: 100D nylon 6,6 mini ripstop has a high thread count in a mini ripstop weave that has incredible tear resistance. Coated with silicone to shed moisture and for waterproofness.
Stays: 6005-T6 extruded aluminum M-bar stays are rigid and lightweight to provide structural support.
Back Panel: HD 80 foam is high density polyethylene foam that provides support and structure to the bag, plus comfort against the back.
Shoulder Straps: 500D ATY nylon 6,6 silicone treated PU is an air textured yarn used in shoulder straps for its durability and aesthetic properties. Silicone treatment helps prevent dirt, snow and water pick-up. Hypercell foam has the benefit of being open cell polyurethane foam that provides stability and comfort. Spacermesh™ lining provides airflow. Polyester yarn is hydrophobic by nature, to repel water.
Top grab handle
Twin aluminum stays for durable support
Side zipper access
Webbing zipper pulls
Kangaroo pocket with top compression strap and snap closure
Stretch-mesh stash pockets on hipbelt
Two Wingman™ one-handed easy access pockets
Designed to fit up to 2L bladder
Internal hydration pocket with zip
GridLock™ shoulder strap adjustment system
Anatomically shaped shoulder straps
Adjustable, removable sternum strap
Padded, contoured shoulder straps
Load level adjusters
Arc'teryx C² (Composite Construction) suspension system
Rotating Load Transfer Disc™ distributes loads to hips
Extendable collar with drawcord for additional capacity
Large, webbing pull-tabs for quick and easy, glove-friendly access
Top loading lid closure with two buckles to secure pack contents
U-Shape zipper for easy access
Removable/ extendable top lid with two zippered compartments
Key clip in lid pocket
Four compression straps - two on each side
P'ax one-hand axe attachment system—allows for one-handed access to tools
Micro daisy chains
210D nylon 6,6 Ripstop
500D ATY nylon 6,6 silicone treated with PU
100D nylon 6,6 mini Ripstop with silicon and PU coatings