Hydration Backpack with 2L Water Bladder – Lightweight & Durable for Running, Hiking, Biking – Adjustable Fit for Men, Women, Youth

COMPACT& LIGHTWEIGHT : This Hydration packs are designed specifically for road cycling /running/ Hiking ,So that's Compact and low-profile so they feel light and stable on your back and won’t create a ton of wind resistance ,keep your body functioning at peak performance whether you're training for a marathon or cycling.