O'Neill Women's Thermo-X Long Sleeve Insulating Rashguard

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SKU: 5025
Product Code: 8161304
Availability: Usually Ships in 24 Hours
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  • Layer up for the coldest waves in the O'Neill Women's Thermo-X Long Sleeve Insulating Rashguard. Featuring Thermo-X Hyperdry fabric that provides maximum insulation, this rashguard keeps your core and arms warm and protects you from rashes. Layer under a wetsuit for next-level warmth and insulation.



    • Nylon / Spandex.



    • Thermo-X Hyperdry:
      ​- Max insulation with minimal water absorption and a DWR coating.
    • Seamless Paddle Zones:
      - Flexible design which utilizes minimal seam placement for comfort.
    • UPF 50+ sun protection.
    • Odor resistance.
    • 4-way stretch fabric.
    • Boardshort connector.
    • Rash protection.
    • Low neck that won't interfere with wetsuit neck.


    Sizing & Fit

    • Tight Fit.


    Country of Origin

    • Made in China.

TOP Thermals

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  • 4.5 Review Stars (3 Reviews)

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  • 2/8/2018 Amazing rashguard

    5 Review Stars By C Carleen

    This rashguard keeps me warmer than any other I have ordered probably because it is insulated.   It is so comfortable when I swim.  It literally moves with me doing laps.  It has lasted longer than any other rashguard I have ordered.  I ordered another one because I love it so much.

    Thank-you O'Neil swimwear and SWIMOUTLET !!

    C Carleen
    Palos Heights, IL

    Fit: Feels true to size

  • 1/16/2018 Brilliant Alternative to Wetsuit Jacket

    5 Review Stars By Katy

    I live in Hawaii and I've been searching for the perfect wetsuit top that will provide some warmth protection during our winter months for surfing.  The water temp is pretty warm here, even in the winter, but it can get chilly with the wind.  I have not been able to find the right wetsuit jacket/top.  They all restrict movement too much, have a zipper on the front that hurts while paddling, or stretch out after some use.

    I ordered this top thinking that I could wear it under my wetsuit jacket because my jacket has stretched out even though I've only been using it for a few months.  This insulating rashguard is BRILLIANT.  It keeps me plenty warm without needing to put the wetsuit jacket over it, and it allows full range of motion.  It is far superior to the 1-2mm wetsuit jackets for when minimal warmth protection is needed.  I wish I had found this sooner!

    I am 5'6", 125 lbs and the Small is a perfect fit.

    Kula, HI

    Fit: Feels true to size

  • 12/26/2017 O'Neill Women's Thermo-long Sleeve Insulating Rashguard

    4 Review Stars By treefrog

    looks nice but is too tight need to get larger size

    Shelton, Ct

    Fit: Feels too small

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More From O'NEILL



Jack O'Neill began surfing in 1952, before functional surf apparel was invented. While working for the Army Air Corps, O'Neill discovered neoprene foam in a DC-3 airplane. He then combined the neoprene carpeting with duct tape to create the first neoprene wetsuit.

Demand for O'Neill's neoprene wetsuits grew rapidly and he began a business selling the O'Neill wetsuits out of his garage. By 1980, he was a leader in the beach apparel industry with a thriving business. Since then, O'Neill™ has become a widely recognized and respected brand in the surf industry, continually creating new and innovative products. In addition to O'Neill wetsuits, they carry O'Neill boardshorts, O'Neill dresses, O'Neill hats, O'Neill rash guards, O'Neill swimsuits, O'Neill water shoes, O'Neill sandals, O'Neill life jackets and O'Neill t-shirts.

In addition to his business success, O'Neill also created a non-profit foundation for kids. O'Neill developed the O'Neill Sea Odyssey Program: a free, educational cruise that introduces kids to the microbiology of the Monterey Bay Marine Sanctuary, beginning at Jack O'Neill's doorstep.