DURABLE MATERIAL - Made with lightweight waterproof & tear-resistant oxford fabric, solid, durable, & strong enough to carry. FOLDABLE DESIGN - Greatly save space after folding, easily carry on your flight, & travel after expansion. Great idea as an extra bag into your luggage bag. BOTTOM ExTENSION & MULTI-POCKET - The bottom of the zipper hides the expansion function, allowing you to solve the trouble caused by too many or too few items during travel. Two zipper pockets & two inside patch pockets & a wet & dry separation bag on the bag. It is enough for short trips & can easily accommodate 3-5 days of travel clothes. PORTABLE & CONVENIENT - The bag is perfect for day-to-day use or occasional travel, the fixed strap design on the back enables it to be placed on the luggage easily, perfectly suitable size as a personal item for airplane seat in front of you, quite convenient for travel. INTENDED USE - Gym, Sports, Travel, Weekend, Luggage, Carry-on Bag, Shopping Bag, Beach Bag, Hiking, & Camping. Suitable for women, men, teens & big kids, great idea as a personal item for airline travel & emergency spare bag in the suitcase. - Capacity: 20-35L - The internal structure of the bag: Zipper pocket, Mobile phone bag, Certificate bag - Opening method: Zipper - Package content: Travel bag1 Foldable Travel Duffel Bag For Women, Large-Capacity Shoulder Bag, Yoga Training Gym Handbag, Sport Crossbody Tote