for more information about the Sperry BIONIC Collection. The Sperry Striper II Slip-On Bionic sneakers have a Navy-inspired design combined with environmentally friendly technology that makes this a truly modern style. Each pair of Sperry BIONIC shoes is woven from, on average five recycled plastic bottles. Upper made with BIONIC material, which is woven from, on average, 5 recycled plastic bottles. Vulcanized construction provides a secure bond between upper and outsole. Breathable textile lining for a more comfortable interior fit. Cushioned removable footbed conforms to the foot for comfort. Non-marking rubber outsole with Wave-Siping for the ultimate traction on wet and dry surfaces. Imported. Measurements: Weight: 12 oz Product measurements were taken using size 9, width M (D). Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.