Large-capacity training backpack with a foldable design, made from durable synthetic fabric for versatile use. - foldable construction - made of thick, abrasion-resistant synthetic fabric - can be unfolded and used as a bag with the included shoulder strap - adjustable padded shoulder straps that can be hidden in a dedicated pocket - two spacious main compartments - inner zippered mesh pocket for small items - ventilated bottom compartment suitable for post-workout gear or footwear - additional front zippered pockets - two large side zippered pockets with internal compartments and insulated lining for chilled drinks - all compartments equipped with strong zippers and pull tabs - main compartment with double zipper compatible with a padlock - Dimensions (folded): approx. 21.7" x 18.1" x 12.2" - Dimensions (unfolded): approx. 12.2" x 33.1" x 15.9" - Capacity (folded): 60 liters - Capacity (unfolded): 109 liters - Material composition: synthetic fabric