10L Windchaser Cycling Backpack Waterproof Breathable Bag For Outdoor Travel ? 6L Mountain Bike Backpack, the ultimate waterproof and tear resistant nylon fabric. Can be used as a drinking bag, suitable for 2 liters of water reservoir, special hole design for water bag (not include 2L drinking bag). ? Adjustable shoulder straps and waist straps fit your cycling, jogging, running needs. Suitable for both mens and ladies, please choose your favorite color, lightweight and durable. ? Sporty look: This ultralight cycling bicycle rucksack is sporty, dynamic, start and seamlessly based on functionality and ergonomic ease. ? Reflective strip design: The reflective strip on the shoulder strap is used to ensure quiet and safe cycling. ? Ideal sport bag for outdoor activities such as biking, cycling, jogging and running etc .. This small backpack can be used as a faithful and versatile companion for your short trips or your sporting experience.