VaporSpan ventilated suspension with moisture-wicking mesh and perimeter alloy frame Women's specific perforated shoulder harness with sternum strap featuring integrated safety whistle 3D cradle padded, women's fit, hipbelt with large zippered pockets Internal hydration sleeve with SpeedClip hydration hanger compatible with Gregory's 3D Hydro reservoir (reservoir not included) Top zippered pocket and interior mesh zippered security pocket Front stretch and dual side mesh pockets for quick storage