Any artwork can be printed on,including animals,holiday designs,stripes or any other designs.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 and mesh cover to put your helmet.Suitable for outdoor activities like cycling,rock-climbing and hiking,etc.Boost your brand when you give out this sports backpack to customers! Measuring 18*23.6 inch, this custom nylon sports hydration 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.