Specification: Color Option: Black, CP, Black CP, ACU Dimensions: 11.81" X 18.11" X 1.57" Material: 900D nylon backpack + TPU hydration bladder Weight: 1.81lb Bladder Capacity: 3L Application: Hiking, Biking, Running, Camping, Hunting, Climbing. Why Choose NOOLA Hiking Hydration Pack? 1. Be well constructed with 4 separate zippered pockets and 5 extra compartments of different sizes to organize your towel, cloth, snack and etc. 2. Made of 900D Nylon material, resistant to scratch and abrasion, built in heavy-duty condition to stand up to abuse in the wildness. 3. Both the bladder and tube are made of TPU food-grade material, BPA free and odor free, safe and reliable. It’s incredibly strong, able to stretch up to 8x its original size without breaking. And its lightweight feature matters a lot for athletes. 4. 3L Large Capacity ensures enough water supply during a long day trekking. 5. The simple bite valve design allows you to take a sip of water without effort, and the automatic close function prevents water from trickling down your shirt or coat. 6. Three straps are all adjustable for reducing bounce. Breathable air mesh padding speeds up air-flow, lessens the pressure on your shoulder and provides lightweight comfort. 7. Constructed with 5 rows of heavy-duty Molle straps allow for the attachment of various compatible pouches and accessories. 8. Perfectly used as hiking hydration backpacks, suitable for hiking, biking, running, hunting, camping, climbing. Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.