SPEEDO Women's FST Minimal amphibious footwear for every activity, from adventure travel to triathlon with lightweight midsole for neutral, natural road feel. Vibram® outsole with TC1 compound is non-marking and offers superior traction and slip resistance. 100% seamless construction comfortable with or without socks. FluidFlow technology provides drainage from upper sole down through the outsole. Ortholite® fully washable, anti-microbial sock liners keep the foot cool and comfortable. Hydrophobic monofilament sandwich mesh selflessly provides quick drying breathability. S-TRAC S-TRAC technology streamlines water away from the outsole and enhances direct surface contact to improve traction and slip resistance. The lightest shoe in our sub-ten ounce range of closed footwear. Shoe Weight: 6.4 oz.