1. Waterproof and anti-fouling - The new TPU-based coated polyester material is more waterproof and anti-fouling than ordinary collars. Collars can easily get dirty when your dog is playing on the beach, grass or swimming pool. Don't worry, just wipe with a paper towel or soft cloth, 2.. INNOVATIVE MATERIALS - The inner layer is a sturdy nylon webbing and the outer layer is an innovative coated TPU polyester material to provide your dog with extra durability. It can withstand more than 700 pounds of pulling force. 3. Bright Colors - Waterproof dog collars are available in a variety of colors allowing you to create a pairing look with your favorite pets. 4. Adjustable Size - The adjustable square ring makes the collar and dog fit better. POM synthetic resin plastic steel buckle, easy to wear.