Durable, high-quality & lightweight water resistance anti-rip nylon material featured with lifesaving whistle and extra waist pockets for essentials.

Fit up to 15-inch laptop and water bladder together. Fleece-lined glass/cellphone pocket, well-organized compartments for tools and pump. Unique external storage pad for helmet.

Well-considered carrying system implemented by 3 Air Mesh back pads, perforated foam insulated shoulder strap, and adjustable chest strap. Reduces the pressure and balances the weight all the time.

Leakproof design. Full-width opening with anti-sloshing baffle for a stable backpack carrying experience and easy to clean.