Camelbak Molokai 70Oz Backpack Fabric / Mesh Torso length - 38cm. Water friendly materials - Provides a water resistant coating. Custom fit tension adjust harness - For a good close fit with cargo pockets to keep snacks, sunscreen and waterproof electronics case secure and at hand. Detachable emergency whistle on left shoulder - For emergency support. Open mesh Air Chanel back panel - For ventilation and comfort.