The Sapphire isn't only about women's specific fit; it's about women's specific comfort. A tuned EVA midsole provides soft cushioning while the TPU chassis provides all day protection. Articulation in the upper allows uninhibited forward motion, yet supports the ankle laterally whether on off-camber trails and crooked subway steps Our trail-focused approach guides our craftsmanship, from creating perfectly fitting footwear to our community and environmental efforts. Key Features: O FIT INSOLE: Engineered for neutral foot positioning. Swiftcurrent Midsole: Customized midsoles ensure precise torsion.