Thule Unisex Airport Backpack Duffel Denier Nylon Durable 420 denier nylon resists ensures your pack will arrive at your destination unharmed When not in use duffel folds into side pocket for compact storage Lockable zippers deter thieves (lock sold separately) Adjustable shoulder strap with elastic strap management Compatible with MOST 60L to 95L backpacks (11.75" D x 15.75"W x 34.5"H)