O’Neill certainly knew what they were doing when they designed the Thermo X Insulative Top. The material is a 220g mix of nylon and spandex that’s soft, stretchy, low-bulk, quick-drying, water repellent, and odor resistant.
We love that it’s thin enough to fit under a wetsuit and the neckline is low cut so doesn’t interfere with the neck of your suit. For surfers, there are seamless paddle zones and boardshort connectors.
There is also a women’s version of the Thermo X, which you can find here. This reviewer has been using hers heavily for more than three years and the rash guard is still in excellent condition.
The O’Neill Thermo X is a top choice rash guard and swim shirt no matter what outdoor or water activities you’re doing. You will not be disappointed.
To help you find a Rash Guard that will fit your needs, we’ve tested, researched, and reviewed the best ones available today.
We test both in the water, diving in various conditions - and in our lab - so we can give you accurate answers on quality, performance, and the overall value.
Read about our test of Rash Guards
Disclosure: We are reader supported, and may earn affiliate commissions when you buy through us.
Take a moment to look at this.
Read next:
