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Your cart is empty.Thermo-X layering fabrics provide incredible insulation with low bulk and quick-dry properties.
Customer
Reviewed in the United States on September 1, 2024
Note that this feels more like a fleece than anything else, and fits much looser than a wetsuit. But it is great when the kids are in the pool but the water is just a bit cold.
ndrwum
Reviewed in the United States on July 12, 2024
The O'Neill Men's Thermo X Long Sleeve Insulative Top is designed to fit tightly, so consider buying your normal size. It provides good insulation, but it can get heavy when wet with water. Overall, it's effective for keeping warm in colder conditions.
Mikey D
Reviewed in the United States on July 11, 2024
This is a unique piece of kit in the surf world I think. A fleece lined rash guard. It's not a wetsuit top, it's too thin to really keep you warm in sub 70 deg water. But what makes it so great is if you are in and out of the water a lot. With wind, when out of the water, this thing is way warmer than a rash guard.
Nancy P.
Reviewed in the United States on December 19, 2024
This shirt exceeded my expectations. I swim laps outdoors and it's gotten cold. This shirt makes it lot more comfortable on cold or rainy days at the pool. Like another reviewer suggested, I ordered one size larger than I typically wear. It is snug so the water doesn't pump too much and it is a little difficult to get off but it works well. I'm about 145 pounds, 5'-9'' and I ordered a large.
jasper
Reviewed in Mexico on December 15, 2024
Todo es bien
Customer
Reviewed in the United States on November 3, 2024
I only buy O'Neill wetsuit products as I find they are the only company whose size chart is accurate for me. This is a well made thin wetsuit long sleeve top that fits like a glove. You won't even know you're wearing it outside of the warmth it provides. It's ideal for this early fall days when the temperatures begin to fall and these's some wind....Mobility, paddling, is excellent..like I said You wouldn't know you're wearing a wetsuit top.
Willy B
Reviewed in the United States on November 12, 2024
Ordered a medium, I'm 5'9" and 160 standard build. I can barely get the shirt on, I know its supposed to fit snuggly but I could barely breath. Oh and taking it off was a two person job. Ordered a large and hoping it will perfect.
Tim
Reviewed in the United States on October 29, 2024
Great for when the water is in high 60s water temps and higher. But good fit and feel.
W. A.
Reviewed in the United States on November 20, 2023
Own a bunch of O’Neill rashguards so naturally picked up a Thermo X for fall/winter. It’s basically what I would call a quarter mil rashguard as it’s slightly bulkier than their standard rashguards given the slightly thicker material with fleece lining. It’s thinner than 0.5mm tops though so 0.25mm seems like a fair description.No issue with movement restrictions. I wear this under a union suit that is under my dry suit for kayaking. Have been down in 20s on the water and not slightly bit cold whatsoever. Works exactly like I hoped. I have some thermal compression shirts I bought for this particular use case and picked this up afterwards. While the compression shirts are warm they sit a tad looser, nothing crazy but noticeably different fit as this sits tighter on body. But the Thermo X is definitely warmer, sometimes paying up is well worth it, this is one of those times.
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