Customer Service

Phone: 1-888-842-5151


The silicone Hammer Head® Swim Cap comes in three sizes; small, medium and large. Although every head is unique, generally the small fits swimmers ages 2-8, the medium ages 8-14 and the large fits an adult. Variables include size and shape of head and length of hair. You will know you have the right size when it feels like the most comfortable cap you have ever worn! You can also put your team cap over the Hammer Head for a more compressed fit. Please see the shop page for specific measurements for each size.

Care Instructions

  • Rinse your Hammer Head Swim Cap after use in a chlorine pool.
  • Turn your Hammer Head Swim Cap inside out after use to dry completely.
  • Dust with Talcum powder occasionally to improve on-and-off process.
  • Avoid sharp objects that may puncture your Hammer Head Swim Cap.

All shipping charges will be added to the purchase when the order is shipped. Your total price at checkout will include final shipping charges. Use the email as notification that your order has shipped as a receipt; it will include all charges.

All orders for in stock merchandise will ship within 1-2 business days.

30-Day Return /Exchange Process
We are confident you will LOVE your Hammer Head Swim Cap! However, for some reason you are not completely satisfied we are ready to help you return your order within 30 days of delivery to you. Returned products must be unused and in its original packaging. We reserve the right to refuse a return that is not in this condition. 

You will be notified if your return is not accepted and we will ship it back to you. A credit will be processed using the same method you used to make your purchase. You can expect this transaction to be completed within 5-10 days of receiving and processing your return. Refunds include the full value of the product, but not shipping and handling fees.


No swim cap can protect you from serious  injuries, including paralysis or death. Use only while swimming and as directed. This swim cap is ultra-thin and is designed to reduce the effects of only minor direct impact with the honeycomb technology system in the cap. Do not use for any other purpose such as under a helmet or other cap. Always follow the directions and use for intended purpose.

Unfortunately, we cannot process exchanges at this time. If you need a different item or size, please return the product you received and place a new order. While we do not currently provide shipping for returns, we can assist you with any shipping charges on your replacement order. Please email customer service at for more details.

Damaged or Defective Product
If you receive a damaged or defective item, please email us at and we can assist you within 30 days of delivery. It is our goal to get your defective product returned and replaced as fast as possible.

We accept no responsibility for product damage incurred if not using the Hammer Head Swim Cap for its intended use. Please see Terms of Use.