Features Proprietary OPTIFITTM suspension system ensures a comfortable and secure fit Vertical channel provides improved ventilation Padded shoulder harness is sleek and anatomical Improved, anatomically designed, load-spreading hipbelt is lined with soft air mesh Huge zippered side entry to main compartment Description Product Description Engineered with a women-specific fit and the easy-to-use OPTIFITTM suspension system, this women's favorite is light and dialed with enough capacity for several days out.