Sperry Syren Gulf Women's Duck Boot Keep the icy slush at bay in the Sperry Syren Gulf women's duck Boot. With a water-resistant nylon and Rubber upper featuring a micro-fleeced lining for extra warmth, this inside zip Boot has the traditional lace-up front for a stylish design. The Memory Foam footbed comforts every step, while the non-marking Rubber outsole offers traction in Slipper y conditions. Nylon/ Rubber upper Inside zip closure Micro-fleeced liningMemory Foam footbedNon-marking Rubber outsole Color: black