The term "bios" isn't just a label

Improve circulation and faster muscle recovery

Outsole: Injection Blown Rubber (IBR)

This boot is engineered to comply with AR 670-1 in construction and materials

and decreased leg fatigue

Altra Men's Superior 7 - Black/Gray Size:7.5 The term "bios" isn't justNimble. Quick. Lightweight. If you want to feel connected to the trail, look no further. As a classic shoe in our trail running repertoire, we made thoughtful tweaks to help enhance your comfort and connection to the trail. New tongue construction and ghillie lacing system is designed for a more comfortable fit at step in, while new tooling offers increased flexibility. Its still got a MaxTrac outsole for grip, but we refined the outsole lug shape and