Features of the ECCO Biom C4 Gore-Tex Golf Shoes: ECCO Performance Leather from our own tanneries is combined with 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 ECCO MTN GRIP has three different sections providing traction, stability and rotational support throughout the swing