The MTB pack for day long adventures or the daily commute.Key Features: Perfect Fit harness system - one size fits all,Adaptive carrier system stabilizes bag,Main compartment with fleeced lined inside pocket,Internal pockets for pump and hydration bladder (BH300 - Not included),2 large front compartments with internal mesh pocket,Zipped pocket with hidden rain cover,2 large easy-access elastic hip-belt pockets,Helmet carrier system,Constructed from Nylon and Polyester,Capacity: 15 Litres (expandable to 18 Litres).