FEATURES BIOM C4 is designed with GoreTex Surround 100% waterproof construction with increased breathability from all angles. Surround Technology enables to keep the foot Dry and Cool or Warm depending on the conditions. BIOM Natural Motion technology brings the player closer to the ground using an anatomical last. Made from ECCO Performance Leather uppers, combined with a new mesh sock for comfort and great fit. The Outsole offers the TPU Motion Grip with 3 different sections providing traction, stability and rotational support throughout the swing. Designed with ECCO Fluid Form- For Over 3 decades this technology has enabled ECCO to create ergonomically advanced mid soles.