Tote Sack: Made of durable PVC-backed polyester with breathable mesh bottom. It holds a Kahtoola KTS, a 1-quart water bottle, or items such as camera, film, cell phone, GPS unit. Wt: 3.7 oz. * Snow Release Skins: The super light KTS Snow Release Skins prevent the snow build up that adds weight to your crampon covered feet. One size fits both KTS models. No tool installation. Wt: 1.5 oz.