Features of the Gregory A3 Air Hipbelt Multi-layer, multi-Density LifeSpan EVA foam padding engineered to provide support where needed and relieve pressure on sensitive Areas Water-resistant with YKKA(R) AquaGuardA(R) zippers Breathable mesh to help wick sweat away Pre-curved, ergonomically tapered hipbelt Adjustable, independently pivoting hipbelt that actively adapts to different body shapes and helps maintain load balance in varying terrain Works with the Baltoro and Deva packs