Aircee Hydration Pack Backpack Water Reservoir Bag Waterproof Rucksack Daypack For Biking Cycling Running Hiking 20.88 option does Not include bladder,27.88 option include bladder. Large capacity-10L: Size: L 9.4 * H 17.7 * W 4.33 IN (L24 * H45 * 11cm). Enough space to hold your necessities for traveling. Lighter weight, lower-profile designA lot of compartments which is great to put things needed for a hike Nylon mateiral, Durable, wearable and practical with excellent texture. Breathable padding behind your backfeatured with waist and chest strap. Breathable padding behind your backfeatured with waist and chest strap. Great for camping, hiking, cycling, mountaineering, running,trekking,marathon.