Size: 10 Color: Yves Blue - USDA BioPreferred Certified - Renewafoam™ soles: reformulated polyurethane, just like running shoes - Using excess waste, TIDAL soles are at minimum 27% renewable - Curved arch support (8mm to be exact!) - Supportive, no-slip treads  - Ultra-comfy straps, made with EcoPure® to enhance biodegradation - Made in USA