The H4 Boa® Coiler provides a uniform fit while Boa® Tongue Tied™ delivers a secure fit in the ankle and eliminates the need for a traditional harness. C.A.T. technology allows for a custom fit in the calf zone for increased comfort. Durable rubber Jade Plus Sole with +Slime Heel Pod provides cushioning and traction in all terrain. The Hera is a medium flexing boot designed for all-mountain performance.