SPERRY TOPSIDER. STS21508. MENS BAHAMA STORM CANVAS DUCK SNEAKER. BLACK. Introducing the rain-ready Bahama Storm -- because a little sprinkle or shower never stopped you. Water-resistant heavy canvas uppers in a handsewn construction with our 360 degree Lacing System for a customized fit. Removable PU insole ensures all-day comfort while a non-marking rubber outsole with molded Wave-Siping provides the ultimate no-slip traction.