Dynamax™ Skull Liner
•Wear as a hat or under helmet
•Seirus' exclusive Dynamax - dual density, micro Denier Thermax
•Thin, warm, wicking, wind-blocking, stretchy
•More stretch. More warmth. More wicking. More wind block. Still thin.
Canadian customers click here!
Prices may vary due to Exchange rates, duties, transport and handling.
See our Care Instructions here!
See our Product Sizing Charts here!
Can I ship to APO/FPO/International addresses?
At this time Seirus online sales are only available for customers in the continental USA, Hawaii and Alaska. Certain products are available in Canada through Sport Dinaco, you can find them at sportdinaco.com. Prices may vary due to Exchange rates, duties, transport and handling. Please contact customer service to find a Seirus distributor in your country.
When should I expect my order to arrive?
All orders will be shipped within 1-3 business days of placing your order. You will have the option of selecting Overnight, 2-Day or Ground in the shipping options. Orders must be submitted by 10:00am PDT to go out same day. Overnight and 2-Day orders will be prioritized. Overnight shipping will arrive by end of the next week day (Monday through Friday). If you select ground it is an estimated shipping time of 3-5 business days. Actual shipping time may vary based on location, weather and other unforeseen obstacles. Business days are defined as Monday through Friday, 8:00am - 5:00pm PDT, excluding holidays. We are closed on New Year’s Day, Martin Luther King Day, Presidents’ Day, Memorial Day, Juneteenth, Independence Day, Labor Day, Thanksgiving Day & Christmas Day and will ship orders again beginning the following business day.
What is the return policy?
We accept returns within 30 days from the shipment date for any purchases made on seirus.com. All returns must be in new condition and have all original packaging and header cards attached. Once the return is received at our facility we will process a refund within 2-3 weeks. The customer is responsible for the freight cost coming back to our facility. We recommend using a carrier that provides a tracking # and insurance. If you purchased the item(s) from one of our authorized dealers, then please contact the dealer directly to process a return.
How do I return my order?
There is a packing slip that shipped with your order which includes instructions for your return. If you have misplaced this, you may download the Seirus Online Return Form to print and send with your item(s).