TYR LBMMB3 25.25" x 19" Big Mesh Mummy Backpack. Updated with a 20% bigger design, the TYR Big Mesh Mummy Backpack is the perfect choice for hauling swim and workout gear. The LBMMB3 features a spacious main compartment for storage, small zip compartment and mesh venting for increased dry time and drainage. Over the shoulder straps allow for easy transport, while barrel-lock closures provide quick and easy access to your gear. Lightweight and functional, this athletic backpack features a side zipper pocket to allow for additional organization and a built-in water bottle pocket to keep hydration at your fingertips. Choose from an array of fun colors to complement your personal style!