Fit Your Carry-on Bag size 21.7 x 13.8 x 8.7 inch fits carry-on item size 22 x 14 x 9 inch of Airlines perfectly, which can be placed under seat and no need to pay carry-on. Fold up when you not use, does not take much space in your luggage, unfolded as extra bag for souvenir or clothes when travelling leaves room for valuables in your suitcase, or used as a carry-on with decent size to fit under an airline seat or in the overhead bin in case you are overweight for a checked bag. Extra Strap A removable & adjustable shoulder strap for extra carrying option. Double Zippers With smooth Reliable zippers, no need to worry any ripping or break during trips. Reinforced Strap Solid straps bear the weight more than 30 Pounds. Water-resistent Made of water-resistent and thick fabric to protect your gears well from rain or wet.