Snowshoes 418 & 438 Up & Down Fit Grip : These models are fitted with an Up&Down lift (TSL patent) to reduce the effects of walking uphill and downhill (the back of the binding passes under the frame to keep the foot flat and prevent it from pressing against the toe of the shoe). grip featuring the precise BOAA(R) Fit System for these Up&Down frames. Description:- DECK Hourglass shape : allows for easier stride when walking Design 3D : Maximum climbing and side-hill traction under the foot BINDING - Lock Adjustment : This easy-to-use adjustment memorizes your shoe size for all your snowshoeing outings. - BOAA(R) Fit System : DIAL IN TO FAST, EFFORTLESS, PRECISION FIT. - AGILITY AND SPEED : The BOAA(R) Fit System enables faster, more powerful directional changes through a seamless connection between equipment and body. - POWER AND PRECISION : Power without compromising precision, the BOAA(R) Fit System delivers more explosive action and unparalleled accuracy. - Tightening through a ratchet system for a secure and fast fit - Sound and Shock Absorbing System (SSAS) UP & DOWN SYSTEM (TSL PATENT) : This TSL patented Up insert equipped with the Up & Down system reduces slope effects and significantly improves comfort while walking uphill or downhill. TRACTION TSL thus guarantees outstanding grip when walking uphill, downhill or on a slope in all kinds of snow. - Design 3D : Maximum climbing and side-hill traction under the foot - Front teeth for maximum traction on steep terrain - 6 + 2 replaceable steel crampons - lateral teeth