• Two Front pockets can hold your wallet, keys, phone, towel, or small items. There are net bags and key hook in one of pockets, which can be used to classify and sort out items. • One external mesh pockets for small items like keys, wallet, phone or storage for a shed layer , open mesh to maximize breathability and keep essentials within easy reach • 3 storage compartments ,suitable 2L / 1.5 Water Reservoir . • Breathable air mesh back panel for a lightweight, keeps you cool and comfortable . • Adjustable mesh shoulder straps to fit your sizes, water backpack for men, women, teens, and youth , with low-profile waistbelts that won’t interfere with your pedaling. • Ideal for hiking, running, biking, walking, all-mountain riding and mountain biking. Specifications Features:Portable,durable,lightweight,wear-resistant Water temperature:Hot water that can withstand up to 60 degrees Package included: 1x Tactical Hydration Backpack 1x 2L Water Bladder