The size of sports backpack are 18.9*12.6 * 11.02 inch with a capacity of 40L. Built-in thick sponge to keep your laptop safe in main zipped compartment, there are also 1 front zipped pocket, 2 hidden side pockets,one of them is the waterproof pocket(for wet towels,umbrellas,etc)and another separate pockets can place your shoes.This weekender backpack is roomy enough to carry what you need in the trip like the camera,hammock,clothes,food and a couple beers. 【Water Resistant& Durable】：This 40L gym duffle bag for men and women is suitable for weekend vacations, which is made of high quality water and tear resistant nylon fabric that provides strength and long-lasting performance. It is skin-friendly, durable and easy to clean.Handle strap and shoulder strap are light and steady in a long-time service. 【Multi-function Design】：Besides being a men's camping backpack, it is also a Shoulder bag/Crossbody bag/Sports Duffel Bags/Handbag, you can convert it freely and easily to meet all of your needs . It has a long adjustable shoulder strap.Our sports gym bag is the perfect companion for indoor and outdoor sports.For exercise, travel, sports activities, tennis, basketball, yoga, fishing, hunting, camping, hiking and many outdoor activities.