Vibram's ample traction
With the Vibram AR outsole, the Arc’teryx Acrux AR delivers traction over terrain mostly characterized by extreme ruggedness and steepness. It is based on Vibram's Mont compound which grants the boot a kind of grip that can perform even in freezing temperatures. Its surface is loaded with anti-slip patterns and lugs of different shapes and sizes. Also, preceding the arch zone is the sole’s heel brake which gives extra stopping power during descents.
Optimal cushioning in Arc'teryx Acrux AR
Unyielding to the stress between the weight of the wearer and the craggy, mountainous terrain is the boot’s midsole. Made of EVA, this cushy platform is designed to give wearers stability and shock mitigation without compromising comfort.
Contributing to the Arc’teryx Acrux AR’s cushioning and support is the carbon fiber insole. Its core is made of expanded PU foam for thermal insulation.
Arc'teryx's excellent weatherproofing
The boot’s heel and toe counters onto which the levers of automatic crampons latch are made of thermoplastic polyurethane. This material is known for its hardiness and level of resistance against abrasions, impacts, and weathering.
Moisture-managing layered upper
The Acrux AR from Arc’teryx has a 4-millimeter, 3D-formed inner shell which is made of PE foam—a material that provides ample cushioning and adequate internal insulation. It is perforated to disperse heat and wick away sweat and moisture from the inside. Its closure system features synthetic laces and Velcro-like straps.
The removable liner is also made of PE foam. Also, the designers imbued it with Gore-Tex’s waterproof membrane with climate control capabilities. This proprietary waterproofing technology has its three layers bonded together for enhanced durability.
360° protective gaiter
Walling off the elements is the built-in gaiter. Made of the same 3-layer Gore-Tex membrane found in the removable liner, this protective covering is waterproof and durable. A zipper implement and a rivet button make up its sealing mechanism. A heavy-duty film made of TPU is laminated onto the base of the gaiter for bump and abrasion protection.