EXPANDABLE TRAVEL BAG: Save space after folding and zipping in luggage. Easy to carry on your flight and travel after expansion. Great idea as an extra bag into your luggage bag. Folding Dimension: 11.5 x 7 inch. Expansion Dimension again: 21 x 13 x 9 inch.MULTI-POCKET: Contains pocket on outside and inside of bag for extra storage.HIGH-QUALITY MATERIAL: Made of high-density nylon, waterproof, light weight; high-quality hardware, neat stitching, and stylish design all make this bag a perfect travel bagPORTABLE & CONVENIENT: The bag is perfect for day-to-day use or travel, the strap on the back of the bag enables it to be placed on the luggage, and then used as a carry on with items from trip on your way home! MULTI USE: Our travel bags are suitable for gym, travel, weekend getaway, luggage, carry-on bag, shopping bag, beach day, and camping. Suitable for women, men, great idea as personal travel bags for airline travel and emergency spare bag in the suitcase.