Bionica Women's Nilsa Water-Friendly Slide Sandals in Black. Be ready for a day at the beach or lake in Bionica's Nilsa slide sandals, featuring knit fabric straps, a fast-drying, water-friendly EVA-cushioned midsole and a grippy lugged outsole. Breathable, fast-drying webbed fabric straps Fast-drying waterproof EVA midsole Cushioned EVA footbed Grippy, slip-resistant lugged outsole Upper: Textile - Lining: Textile