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Blueseventy Adjustable Thermal Skull Cap
Blueseventy Adjustable Thermal Skull Cap

Adjustable Thermal Skull Cap

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Backorder: This item is currently out of stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

The Thermal Cap for Cold Open Water Swims

As the ultimate tool for being warmer during your open water swims, the Blueseventy Adjustable Thermal Skull Cap is practically essential. With a durable design and ultra-thermal construction, this triathlon-ready skull cap keeps you comfortable even in chilly waters.

This super warm swim cap features high-quality 3mm Yamamoto SCS-coated neoprene, which allows for high-quality swimming that can be used in both chlorinated and salt bodies of water. The SCS coating also reduces drag making the swimmer more streamlined, increasing your time so you can head straight for the podium. The construction is paired with a Zirconium thermal liner, which can be found in Blueseventy's Thermal Reaction wetsuits for warmth beyond belief. By incorporating the Zirconium internal jersey into this powerful tri skully, water absorption is reduced to help create an extra boundary layer that protects against heat loss.

For 2021 Blueseventy has updated this popular product to make the chin strap adjustable with a Velcro closure. Simply adjust the strap to where it feels comfortable but secure and trim off any excess strap with sharp scissors. The Blueseventy Adjustable Skull Cap is softer and more comfortable than ever, allowing you to embrace your aquatic passions with speed and dexterity.


  • 3mm Yamamoto SCS-coated neoprene reduces drag
  • Zirconium thermal liner keeps you warm
  • Velcro closure chin strap for added adjustability
  • Wetsuit-like fit for added comfort

  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    Head Circumference15"-22"22"-24"24"-30"   

    Material: 3mm Yamamoto SCS-coated neoprene 


    Liner: Zirconium thermal liner 


    Fit: Wetsuit-like fit 


    Closure: Adjustable Velcro 


    Discipline: Triathlon / Swim 

    Black - Small

    Mfg PartNum: ACTSK-21-BLK-000S 

    Black - Medium

    Mfg PartNum: ACTSK-21-BLK-000M 

    Black - Large

    Mfg PartNum: ACTSK-21-BLK-000L