This Backpack Water Bladder Vest Kit aligns your back while gently protecting your muscles. The ventilated mesh cover keeps your back cool by maintaining air circulation, preventing discomfort due to accumulated heat, and providing excellent air circulation and breathability.High-quality nylon material and ultra-lightweight design make it more comfortable to drive.For cycling, hiking, running, skiing, cycling, mountaineering, hunting, racing and training.A great promo gift for clients who enjoy outdoor sports.Customized with your own logo.