Lightweight handy hydration system. Product description for Marmot KOMPRESSOR ZIP from our collection of Outdoor Sports & Fashion: Hydration on the go - the Kompressor Zip by MARMOT runs the gamut from short backyard trails to pacing your partner on the Leadville 100. Working closely with the hydration industry leader Hydrapak®, MARMOT crafted a durable yet lightweight hydration system that centers on a 500 ml Soft Flask. The Kompressor Zip has a highly compressible compartment that fits a cell phone or light jacket. Includes Hydropak 500ml FlaskFits Cell Phone, Keys and an Ultra Light JacketInternal Organizer with Key ClipHighly CompressibleYKK ZippersDurability Without the WeightWeight: 50g (1.8oz) Material specifications for Marmot KOMPRESSOR ZIP Main material: 70D Nylon Robic RipstopReinforcements: 100D Nylon Triple Ripstop