Rubber sole. FITKICKS Original Mens Edition Foldable Active Lifestyle Minimalist Footwear Barefoot Yoga Water Shoes. Slip-on design footwear with minimalist aqua shoe look and feel – full movement potential – ample toe splay – ergonomic fit – conforms to foot. Supports foot with enhanced comfort and mobility – minimal design with inner cushion – convenient pull tabs – protective toe guard – signature grip strap – Flex Form sole technology – fold