Bike rucksack; FLEX MOTION suspension system provides optimum freedom of movement due to its secure fit; Chest strap is adjustable and has a signal whistle; Elasticated waist STRETCH BELT can be stored behind the back padding; Zip-fastening main compartment has space for a drinks bladder and a small ORGANIZER compartment with a key carabiner; Two mesh side pockets; Elasticated lashing option for your helmet; Anchor loop for LED light; Reflectors offer added safety; Set-up has tube duct and attachment for a hydration system; Integrated raincover in the base compartment; Weight: 790g; Material: 100% Polyamide. Lining: 100% Polyester; Ideal for mountain-biking and beach sports, this compact, single-chamber rucksack is a comfortable vessel in which to transport your belongings from A to B.