【Premium Material】Made of high-density polyester fiber, lightweight and durable. Many tests have shown, our sports drawstring bag still maintains the original appearance after long-term use, without traces.  【Suitable Size】The size of the drawstring backpack is 42 x 34 cm/16.54 x 13.39 in, which is light weight and suitable size, enough to carry various items. 【Adjustable Shoulder Strap】The length of the shoulder strap can be easily adjusted to fit your comfortable position. According to your height, you can adjust the length of the strap by tying knots.  【Unique Design】The drawstring closure allows you to quickly store items and put them in and out easily. Additionally, thick drawstrings protect your shoulders from sinking in and help reduce the load on your shoulders. 【Multi-purpose】Suitable for many occasions, such as swimming, fitness, running, cycling, camping, climbing, traveling, shopping, etc.etc.