Flex Rating: 10 (1 Soft – 10 Stiff)The firm flex thin profile 3D molded tongue controls allows you to adjust the profile of the tongue’s thickness to control its flex, enhances its ability to wrap the forefoot, and reduce shell/liner stack-up for improved comfort. Offered in soft, medium, and firm flexing options based on the ride of each boot. The power spine backstays fine-tune medial/lateral support, edge to edge response, and durability.

The Vibram® ExoSep™ Recycled Rubber Outsole is recycled rubber and backed by nearly 70 years of mountaineering knowledge for superior traction, feel, and light weight. Rubber Ice Spikes are soft and grippy with stiffer spikes that dig into ice when slipping isn’t an option. B3 Gel provides ultimate dampening that is formulated to withstand repeated impacts without breaking down.

Speed Zone Lacing is lightning fast lacing control. Customize the fit of the upper or lower zone in seconds – without forcing your friends to wait. Get more power, improved response, and increased wrap – with less effort. Shrinkage footprint reduction technology reduces the boot’s overall footprint one full size, meaning a men’s size 10 fits like a size 10, but has the footprint of a typical size 9. Shorter, lighter, sleeker – never suffer from toe drag again. The liner is a new Imprint™ 3X liner with Rad Pad for lace comfort.

These babies are made of EcoSmart™ Recycled Mesh Upper Materials.