Tesla Men's Lightweight Sports Running Shoe E621 PR2 For a more comfortable fit we recommend going up half a size. Lightweight shoe provides feelings of walking barefooted for a more natural walk. Quick-dry function : Integrated vent-mesh upper design maximizes the surface area and keeps your foot cool. Flexible movement- Flex groove sole with hydro-grip outsole provides excellent traction and stability for all surfaces and terrains. Dura glide : Optimal formulation of thermoplastic polymer with advanced technology for less stiffness but more sturdy EVA midsole.