Professional Cycling Hyaration Backpack

Ergonomic design: Adjustable backpack with orthotics, gravity spreads all around, without any burden and without wobbling during sport
10 L large capacity backpack , which makes it a terrific companion for all your day-long outdoor adventures including running, cycling, hiking, fishing, etc.
Hyaration Insulation Layer : With a hydration insulation layer made from high-quality aluminum foil that keeps liquid cool for up to 4 hours, (works great for 2-3L bladder), this daypack can also be used as a hydration backpack or portable cooler for both indoor and outdoor. There is even a clip on your right shoulder strap to help fix the hose of the bladder.