Flexible Strobel Construction with Sebago Water Drainage System. Synthetic Leather Upper with TPU Reinforced Breathable. Mesh Panels. Padded Tongue with Combination Webbing and Molded. Eyelet Lacing System. Rear Webbing Pull Loop. Removable Anatomical 4.5mm EVA Ventilated Footbed. Reinforced Protective Rubber Toe Bumper. Nylon Mesh Lateral and Medial Sole Drainage System. Sebago Siphon Sole with Slip-resistant, Non-marking Protective Rubber Sole.