Breathable and comfortable: The back has been especially has a thick padded mesh material for optimal comfort to minimise pressure on the shoulder. Thanks to the suspension system to air on the road from top to bottom flow. Can be a rucksack for a soothing for a fresh feeling all day long.perfect fit: The backpack has been ergonomically developed and can adjust fits perfectly around the double S Shape the spine. With the chest strap and waist belt, rucksack in you ride on body very securely fastened. You won't even at the curvature not shake.ideal hydration system: The Shoulder Strap is a concealed H2O output for drinking water bag. You can even when on the road drink at any time. Made from waterproof and Long-lasting polyester this rucksack has a long service life.Comfortable & Easy design: Large U-shaped opening zip is practical for you, your items use. Multiple storage options in the front pocket. In the mesh pocket you can easily save small items such as keys, coins. Adjustable chest strap one size fits all customers Perfectly.Credible safety guarantee: The reflective stripes on the shoulder strap can be used to, quiet and safe on your bike ride in the night . Ultra Light and durable. Suitable for all kinds of outdoor activities such as cycling, mountain climbing and climbing, hiking, traveling etc.