ECCO Performance Leather from our own tanneries and a super-stretchy mesh sock ECCO FLUIDFORM™ Direct Comfort Technology for cushioning, rebound and flexibility GORE-TEX SURROUND® for 100% waterproof protection and 360-degree breathability BIOM® NATURAL MOTION® Technology brings you closer to the ground for stability and control BOA® Fit System delivers micro-adjustable precision fit and is engineered to perform in any conditions ECCO MTN GRIP has three different sections for traction, stability and rotational support throughout the swing