Atlas TreelineThe Treeline features Atlass Spring Loaded Suspension, a patented design that allows for impact absorption, natural side to side flex and deeper crampon penetration for an uncompromised stride. Comfort and security come standard with the Wrapp MTN binding which utilizes the BOA Fit System to provide a fast, precision fit with on the fly adjustability. The variable forming of the aluminum Reactiv frame changes from a cylindrical to an elliptical shape