Sperry Top-Sider Men's Canoe Liner Solid 3-Pack These shoe liners are the perfect accessory to the Authentic Original boat shoe The unique canoe shape curves to the foot providing a soft lining with a signature Sperry Top-sider wave-siping pattern at the heel to prevent shafing and slipping 68% Acrylic, 18%Nylon, 13%Polyester, 1% Spandex