【Large Capacity Design】This waterproof swimming fitness backpack has a moderate size and sufficient capacity to accommodate a variety of sports items.Whether it is sports clothes,shoes,gloves, or sports towels,books,etc.can be easily put in,easy to organize and carry. 【Unique Design】This backpack has a large main compartment and a drawstring closure design,so that items are not easily scattered.External mesh bags can be placed water bottles,both safe and convenient.The thick drawstring reduces shoulder load and increases comfort. 【Material】Made of high-density Oxford fabric,this backpack is lightweight and durable.After many tests,it can still maintain its original appearance after long-term use to ensure durability. 【Adjustable Strap】The shoulder strap can be easily adjusted according to individual needs to accommodate people of different heights.The thicker pull rope effectively reduces the burden on the shoulder,making it more comfortable to carry. 【Multi-Purpose Application】This waterproof swimming fitness backpack is suitable for a variety of occasions,such as swimming,fitness,running,cycling,camping,mountaineering,tourism and so on. Convenient storage and sorting,to meet your needs in different occasions.