Precision and comfort for the alpine.
The Aku Viaz GTX Men''s Boot is designed for use under reasonably heavy loads on rough hiking trails, rugged alpine ridges, and via ferratas. The upper, made of soft and supple suede, incorporates Aku''s Air 8000 technology for unparalleled breathability when you''re humping a load under the Dolomite sun, and it sports a Gore-Tex Performance Comfort waterproof membrane to keep your feet dry when, in the course of 17 seconds, dark clouds roll in, obscure said sun, and start turning the trail into a river. Regardless of trail conditions, the Viaz''s sticky and tough Vibram Nepal outsole will keep you from slipping around like a deer on a frozen pond, and the speed lace hooks make it easy to dial in the right snugness.

If it ended there, the Viaz would be a killer boot, but it doesn''t. Aku''s real party trick is the fit. The Viaz features the IMS-1 Precise (Internal Midsole System, if you''re keeping score) to help you achieve the perfect fit, with an internal micro EVA layer on top of a super-thin nylon lasting board which together provide the stiffness to conquer rugged terrain and the softness to keep your foot from slipping and banging around inside your boot. To top it off, there are IMS 162footbed, which you can choose between depending on the volume of your foot. If there''s a more precise hiking boot out there, it''s hiding itself pretty well.

Suede and Air 8000 upper
Gore-Tex Performance Comfort membrane
IMS-1 Precise midsole (EVA)
Vibram Nepal outsole
Rubber rand
Nylon and EVA lasting board for medium stiffness
IMS 162 footbed
Lace closure with speed hooks
Item #AKU000A

Upper Materialsuede, Air 8000
WaterproofingGore-Tex Performance Comfort
LiningGore-Tex Performance Comfort
Closurelaces with speed hooks
FootbedCustom Fit IMS 162
MidsoleIMS-1 (EVA)
SoleVibram Nepal
Claimed Weight(single) 1 lb 7.28 oz
Recommended Usebackpacking, hiking
Manufacturer Warranty1 year