Dependable Material: This swim cap is made of elastic polyester fabric with neat stitching, making it sturdy, durable, tear-resistant, and non-deformable even after stretching.Feature: This swim cap features a pleated design and a tie at the top, making it both stylish and practical. It securely holds hair in place, preventing it from getting into the water. While not waterproof, this swim cap reduces drag caused by loose hair while swimming and protects your hair. The soft material ensures a comfortable fit, allowing you to fully enjoy your swim.Relevant Usage: This swim cap set is designed specifically for swimming. With an elastic range of 32.5-70cm, it can firmly fit various hairstyles, including short hair, long hair, thick hair, and curly hair.