Sale: About 12,000 kids go to the ER every year for brain injuries sustained in strollers or baby carriers. Protect your child’s head with GelDefender. Sign in or create an account for 50% off all small Max skull caps!

Purchase a MaxPlus, with elastic band around the bottom and spandex over the top, for $64.95. Designed for tighter-fitting helmets (e.g. football or hockey helmets).

Purchase a Diamond, with no elastic band or spandex, for $54.95. Designed for use inside baseball caps.

Purchase a Max, with an elastic band around the bottom and no spandex over top, for $54.95. Designed for looser helmets.

Use the Size Chart below to determine the size(s) you need, and place your order for each product.

Click here for our video on how to wear GelDefender® Skull Caps..

Size Max Diamond MaxPlus

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Small 6 - 6 1/2 19 - 20 3/8
Medium 6 1/2 - 7 20 1/2 - 21 7/8
Large 7 - 7 1/2 22 - 23 3/8
X-Large 7 1/2 - 8 23 1/2 - 25

GelDefender® skull caps are manufactured with Impact Gel®—a natural product derived from soy and other natural oils with exceptional properties for dissipating the energy from impacts.

GelDefender® skull caps add only an average of 8 ounces of padding, a light weight that players will hardly notice under their helmets or caps.

GelDefender® skull caps fit youths and adults with head sizes 6 to 8. They cover the side of the head above the ears, as well as the temples, the forehead and the rear and the crown of the head.

Shipping by USPS First Class is free.

If your shipment is not received within 10 business days of your order, email GelDefender® at, and we will investigate your order and provide a prompt response.

International orders are shipped via the USPS international flat rate service. Shipping costs are $26 for up to three skull caps.

Because GelDefender® Skull Caps are personal products, hygiene issues are important and refunds of opened products will not be issued. However, if you were shipped a size other than the size you ordered, your unopened product may be returned if you contact us within 30 days of receipt of your purchase. Upon receipt of your return, a new GelDefender® product will be shipped to you.


See full Return & Exchange policy

Availability: In stock



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