- 600D/420D polyester. U-shaped double zippered main compartment. Converts from duffle into backpack. S-shaped backpack strap tucked away into zip pocket. Zippered drop pocket in main compartment with feature print. Padded back, base and shoulder straps. 2 hidden pockets. Ventilated shoe tunnel in side. Detachable, adjustable shoulder strap with pad. Strong moulded plastic handle. Metal pullers. Swing tagged.