éSire is made from full grain leather and is fully waterproof, equipping wearers to keep going at full pace no matter what the elements. The seams are sealed to keep the water out so that your feet stay dry. Sire is made using Cat Footwear?s EASE technology. EASE is 10-15% lighter than standard EVA soles making the Elude comfortable to wear for long periods. EASE is seriously shock absorbing. The sole unit has 30% more bounce back. EASE is incredibly durable. Material: Leather.é