Lior Men's Commuting Business Bag Lightweight Casual Daypack with USB Charging Port for Business, Travel, Daily Use[ Zippers] The surface material is made of new generation waterproof Oxford cloth material, waterproof and wear resistant. With thezipper, the stitching around the zipper is more durable than before. [Unique function] With external USB port, you can charge your mobile phone when carrying it, which is convenient to carry. [Breathability] Padded Air cushion of the shoulder strap reduce the pressure effectively. Adjus table buckle waist strap keep the