This drawstring backpack gym string bag is made of high-quality polyester fabric, which is lightweight, durable, and has a good hand feeling. The main pocket of the bag is large enough to hold a 15-inch laptop, an iPad, a mobile phone, a wallet, a water bottle, and some small items. The adjustable drawstring design makes it easy to carry and use. The backpack is suitable for various occasions, such as gym, sports, travel, hiking, running, cycling, and more. It is a great gift for friends, family, and colleagues.