Osiris D-3's run a full size smaller then most skate shoes Designed and endorsed by Dave Mayhew. The Osiris D-3's feature: New 8 point breathe-right ventilation system with double layered mesh panels. Internal toe box with comfort padding. High impact resistant lightweight P.U (Polyurethane is a flexible rigid foam durable and dependable for high performance action) stabilizer midsole. Full foot helium tunnel compression anti-impact system.(Available Options: Shoe Size 5, Shoe Size 5.5, Shoe Size 6.0, Shoe Size 6.5, Shoe Size 7, Shoe Size 7.5, Shoe Size 8, Shoe Size 8.5, Shoe Size 9, Shoe Size 9.5, Shoe Size 10, Shoe Size 10.5, Shoe Size 11, Shoe Size 11.5, Shoe Size 12, Shoe Size 13, Shoe Size 14)