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O'Neill Wetsuits Thermo-X Shorts

O'Neill Wetsuits Thermo-X Shorts 4.5 5 2

Availability: In stock


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Comfort in frigid waters is extremely important and the O'Neill Thermo-X Shorts cover a key region. Meant to be worn under your existing wetsuit, the Thermo-X Shorts are a soft and stretchy layering piece offering incredible insulation with minimal bulk. Snug without being restrictive, odor resistant, and built tough for long-lasting use, the O'Neill Thermo-X Shorts are a premium cold water choice for additional warmth and extra protection from the elements.

Product Features

  • 220g Nylon/Spandex with HyperDry for maximum insulation and minimal water absorption
  • Maximum core insulation
  • Water repellency, odor resistance
  • 4-Way stretch fabric
  • Rash protection
  • 50+ UPF Protection


O'Neill Wetsuits Thermo-X Shorts Nice addition to winter gear. Review by Nick from the East Coast(US). Nick from the East Coast(US).
Very comfortable and warm. But, wish they had elastic in bottom of legs to hold them in place.
(Posted on 1/10/2019) 2019-01-10
O'Neill Wetsuits Thermo-X Shorts Unreal warmthReview by Goyajoe Goyajoe
Very warm but was disappointed they don't have elastic at bottom of leg to hold in place when you pull on suit they ride up.they 8oz.have it.
(Posted on 12/16/2017) 2017-12-16

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Size Chart

O'Neill Men's Rash Guards — Size Chart

The staff at Cleanline Surf specialize in sizing O'Neill Wetsuits and O'Neill Wetsuit accessories. If you have never tried an O'Neill rash guard before, we strongly urge you to call us for expert advice on sizing. We do have a size chart available below, but please take it with a grain of salt.

XS5′7″-5′9″125-140 lbs36.5-37.5″28.5-29.5″
S5′8″-5′10″135-155 lbs37.5-39″29.5-31″
M5′9″-5′11″155-170 lbs39-41″31-33″
L5′10″-6′0″170-190 lbs41-43.5″33-35″
XL5′11′-6′1″190-210 lbs43.5-46″35-37″
2XL6′0″-6′2″210-230 lbs46-48.5″37-39″
3XL6′0″-6′3″230-250 lbs48.5-51″39-44″


Returns are easy! We understand that in some situations returns or exchanges may be necessary. We also want you to be stoked on your purchase. If you are not 100% satisfied with your purchase you may return it for a full refund, or exchange within 30 days of receiving your order. Items must be in new condition with original tags and packaging.

Please make sure your wetsuit fits before taking it in the water. We are not able to take returns or exchanges on used wetsuits.

Please reference our full Return Policy.

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