Ships from Hong Kong. This silicone swim cap is lightweight and durable, which is easy to carry. It is designed to prevent over pressure and keep water away from your ears. The silicone allows the head to breath for a more comfortable fit and can be stretched to over double of its original size. It is environmental and waterproof. If you're looking for a fashionable, pratical and different swim cap, this swim cap is your best choice. One size fits most.