420D honeycomb fabric/1680D polyester with 210D polyester lining hydration pack. Includes a 2 liter PEVA hydration bladder and tube with bite valve. Features a large main compartment with double hooked bladder pocket and space for other gear; a front compartment with interior organization; a small front zipper pocket; 2 side mesh pockets; adjustable shoulder straps and sternum strap; padded back with air channels; and reflective tape detailing. Includes decorative Basecamp dog tag. Keep yourself hydrated during any excursion! YOUR PURCHASE MAKES A DIFFERENCE! We are proud to partner with Wounded Warrior Project® and will be donating 1% of SnugZ Basecamp sales with a minimum of $100,000 per calendar year to support their mission to honor and empower wounded warriors. Wounded Warrior Project