BAG SIZE: 420*308*218mm DURABLE. Made with high quality material, ultra-light, tear and water resistant .The extra strength provided by double-layer bottom piece, enhanced by bar-tacks at major stress points makes it very convenient to carry more load on your journeys. COMFORTABLE. Breathable mesh shoulder straps with plentiful sponge padding help relieve the stress from your shoulder. The length of the shoulder straps is adjustable. The chest strap with a whistle buckle help you lock your backpack in place. MULTI COMPARTMENTS. One main zipped compartment help you further organize things. One zipped front pocket is good for holding small accessories. Two side pockets are good for holding water bottles and umbrellas. LIGHTWEIGHT(250g) . Fold the backpack into its own pocket and unfold it when you reach your destination. To avoid overweight charge, simply unfold from your checked bags and use it as a carry on for your excess baggage.