DJDZ's elastic cord is durable and breathable, ensuring breathable while maintaining durability, Soft texture and elasticity will not hurt your ears. and elastic bands within the allowable stretch elastic deformation range can be easily restored to the original length without deformation. SO These elastic cords can be used for swimwear, underwear, sportswear, baby clothes and most of clothes. Importantly, in this critical period, you also can use it on protective clothing and tighten the seal, protect you from outside world.