eS - EK-01 (Brown/Brown) - Men's: The lightweight midsole with System G2 is the best part. Designed and tested by pro skater Eric Koston. All synthetic or leather upper with mesh. Double-padded tongue and collar. Full-length EVA midsole. System G2 heel cushioning gel insert - designed exclusively for skateboarding. Unlike EVA or other shock absorption material like air bags, System G2 cushions hard landings without giving up board feel and control. The new STI technology is also more responsive and last longer than anything else. Ststem G2 is the most advanced skate footwear technolgy available. Once you skate on it, youll also know its the best. Zig-zag tread pattern in key areas. Outsole flex grooves for increased grip. 400 NBS stitched gum rubber outsole. EVA footbed with removable arch support. Pick up a pair today!