Customize with your company logo for a great brand publicity.Sports backpack,made of ultralight waterproof nylon fabric.Adjustable shoulder strap,chest strap and waist strap to fit your need.With whistle design on the chest strap.Ergonomic design on the back for maximum breathability and comfort.Reflective strips for safe riding at night.Rain cover included.Suitable for outdoor activities like cycling,rock-climbing and hiking,etc.Showing your brand wherever you go! Made from oxford fabric material, measuring 7.1*17 inch, this custom oxford fabric hydration bike backpack with water bladder. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization: Logo printing available with multiple packaging and color options. Product Highlights: Portable, durable, practical for daily use.