Synthetic upper; Hook & loop closure system for quick adjustability; Lycra neoprene lining for padded comfort; M-Select FRESH naturally prevents odour before it starts for fresh smelling feet; Textured EVA footbed offers non-slip comfort & resists odour; Built to Get Wet construction with water-friendly, quick dry materials; Moulded nylon arch shank; Merrell air cushion in the heel absorbs shock & adds stability; M-Select GRIP tunes each outsole with durable traction that grips when & where you need it; :: Boy > Shoes