Mile after mile, the Circuit™ Vest will keep you going. The Crux® reservoir flowssteady hydration and sternum strap adjustability tailors the fit so you can focus on setting your personal best. Camelbak's women’s vests utilize body mapping technology, for a tailored fit and excellent cooling. Design: S-curved shoulder harness is contoured to fit a woman's body for added comfort and stability Vest shape is thoughtfully designed with a women's torso in mind