Men's O'Neill Thermo-X S/S Crew


    Neoprene Type Water Repellant Poly Fleece
    Seam Construction Flatlock
    Internal Features Odor resistant fabric
    Additional Features SPF 50+
    Warranty 1yr
    Manufacturer's Part Number 5021
    Allergy notice: It's rare, but neoprene (wetsuits) and/or the materials used in its construction can cause allergic skin reactions. If allergic, discontinue use and consult a physician.
    Warning: California Proposition 65
    Warning: This product can expose you to chemicals including Chloroprene, which is known to the state of California to cause cancer and birth defects or reproductive harm. For more information, go to

    O'Neill Size Chart:

    O'Neill Wetsuits Size Chart

    Wetsuit Reviews: Men's O'Neill Thermo-X S/S Crew

    Average Customer Review: 5 out of 55 out of 55 out of 55 out of 55 out of 5 - 6 Reviews

    Write a Review and share your thoughts with others.

    5 out of 55 out of 55 out of 55 out of 55 out of 5 Perfect for Paddling
    Reviewer: Steve Williams   |  10-8-2018

    I bought this to use while kayaking. I wanted something that wasn't too restrictive and this is perfect. Much easier to get into than other wetsuit tops I've tried. It's perfect for early fall days on the water; enough warmth but not hot or binding.

    5 out of 55 out of 55 out of 55 out of 55 out of 5 High quality, very comfortable and warm
    Reviewer: Colin   |  5-7-2018

    I'm an ocean swimmer in Hawaii, and wearing this keeps my torso a good 3, maybe 5 degrees warmer than the water I'm swimming through.I love it! And it drip dries VERY fast, since it's so porous. I'm very tall, long torso, and the large size fits me perfectly. It has a front loop for tying to your shorts, but I haven't needed to use it yet. I've used it about 10 times now, and if it doesn't shrink more than the 1 inch in length I've experience so far, I won't need to tie it off anyway, for swimming purposes.

    5 out of 55 out of 55 out of 55 out of 55 out of 5 warm and dry
    Reviewer: Richard   |  1-6-2018

    I go surfing and stay warm. When I get out of the water and pull the thermo-x off i'm dry and toasty.

    5 out of 55 out of 55 out of 55 out of 55 out of 5 Great liner for my waterskiing wetsuit!
    Reviewer: Gina Wulff (for Bob Wulff)   |  8-17-2016

    It is just the right weight and warmth for the chilly Lake Tahoe waters. Great find.

    4 out of 54 out of 54 out of 54 out of 54 out of 5 Top quality, durable, effective - too short for very tall guys, though
    Reviewer: Colin   |  4-19-2014

    DEfinitely much, much more effective than typical rashguard shirts in keeping me warm while distance ocean swimming. Being a very tall, thin guy (6'4", 175 lbs), the "large" is the right torso size for me but - it's too short! Rides about an inch above my navel. It does have a tie down loop in front, which is good, but I prefer not having up-tugging on my shorts, for probably obvious reasons. I wish Oneil would offer a long-body option,even for a bit more price. For all you normal and short-frame folks, you'll be very pleased as I am otherwise. Really a great, sturdy product!

    5 out of 55 out of 55 out of 55 out of 55 out of 5 does the job
    Reviewer: Jim   |  6-23-2013

    I needed a little extra warmth during the spring & fall months. The water temp. ranges 60 to 66 degrees. My wetsuit is 3mm. The fit is good, lots of flex and did the job I wanted. The price is a little high, but worth it.