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Thermalution Surf Series (15M)

Usually Ships in 24 hours.
Undersuit Heat Up Time:
Heats up in under a Minute
Battery Duration:
Battery Duration: 1.5-2.5 hours (depends on temperature setting)
Maximum Water Pressure Depth:
Dive up to 50ft below the Surface
Micro Controller Settings:
Temperature Settings: Low, Medium and High
12 Month Limited Warranty
Thermalution is tested and certified to CE, TUV and UL and IP waterproof standards
Product Includes:
Product Includes: Undrshirt, Two Batteries, Charger and Controller

Product Description

The Thermalution® Power Heated Undersuit is the world’s first battery powered undersuit, designed to keep you toasty warm, even in the coldest conditions.  Powered by two 7.4 volt Lithium Polymer batteries and worn under your wetsuit, drysuit, or even winter jacket, the Thermalution® will spoil you on a cold day.  Whether you are in the water surfing, diving, kayaking, or kiteboarding or on dry land hunting, fishing, or snowboarding, this suit will change the way you feel about going out on a brisk winter day. 

Thermalution® is by far the warmest heated wetsuit product available for surfing, kiteboarding, kayaking, SUP, or any other top-of-water sport!  Equipped with DOUBLE THE BATTERY POWER of other Heated Wetsuit products, you will immediately notice the heat difference when turning on the heat.  With a weight of only 1.5lbs, the only thing you will notice about this suit during your session is the warmth.  With three levels of adjustable heat, the Thermalution Surf Series allows you to change the temperature of your wetsuit during your session adding more warmth when you are cold or even turning it off if you start to get too warm.  The Thermalution Surf Series gives you absolute control of the amount of warmth in your suit.  

Run Times at Various Temperatures:

Low: 2 Hours 15 Minutes

Med: 90 Minutes

High: 60 Minutes

Thermalution® uses Far Infrared Ray technology, which doesn't just heat your skin like many other products.  Thermalution® actually heats deep within your core, giving you improved blood circulation, enhanced cell and tissue regeneration, pain relief, and comfort to the entire body.  You will be amazed at how much more comfortable you will feel after turning on the suit to even only the lowest of three settings.  Once you have a session in a Thermalution, you won't ever want to venture out on a winter day without one!

Similar to any base layer clothing (like Under Armor®) Thermalution Undersuits can be worn beneath any wetsuit, dry suit, or jacket. 

Wearing beneath a wetsuit

The Thermalution Surf Series suit is designed to be worn beneath your wetsuit to give you the added warmth needed when your core temperature needs it the most.  Thermal protection of a wetsuit is limited to insulate your body and minimize heat loss. The more sealed your wetsuit is, the warmer you will feel.  The Thermalution Surf Series has the ability to get extremely warm.  If you are in a DryLock or other High Quality Chest Zip WetSuit like our Isurus Wetsuits, the low setting will be the only setting you need to use.  However, if you are in a suit that frequently flushes a lot of water in through the neck, you will need to use the higher settings to account for more water entering and exiting the wetsuit.  

The Thermalution can be worn with any of your wetsuits, allowing you to get into thinner neoprene earlier in the Spring.  Adding the Thermalution to your 4/3 will keep you out of the 5.4 for longer than all of your buddies.  Thermalution generates heat instead of only been able to reduce heat loss. By wearing Thermalution® Power Heated Undersuit beneath your wetsuit it distributes the heat through whole body by the water underneath your wetsuit.

Battery and Controller

Thermalution Heated Undersuits use two 7.4 volt Rechargeable Lithium Polymer batteries. (Charger Included) Battery Size: 4x2x0.5 Inches.

There is no danger of radiation, electric shock or explosion from these batteries. Batteries are compact and lightweight and are positioned outside of the undersuit at the sides of the chest, under the arms. It offers maximum freedom of movement and it's easy to change batteries.

Thermalution micro controllers are easy to use. To turn on the undersuit push and hold button for 2 sec. On start up it displays a green light and starts temperature on low. Push once more to change to medium temperature with an orange light indication and once more to change to high with a red light indication. To turn the undersuit off simply push and hold button for 2 sec.

Product Reviews

Write your own product review

Showing reviews 1-10 of 56 | Next

  1. Surf rhode island winters till I drop

    Posted by Joey bonelli on 17th Jan 2019

    To the 65 year old California surfer who thinks 50 deg water is cold, i'm 65 and that's spring for us, try 34-36 deg.best thing to ever happen to me!loved it so much,I bought 2.I treat it with love and care and it keeps me toasty when the air temp was 18 deg f for future design,a flap or something to keep battery from popping out when putting on, although I modified how I put it on and it's all good

  2. Thermalution + heatedwetsuits.com=a good deal

    Posted by Kenneth Norway on 1st Feb 2018

    I never tried Quicksilver because the reviews are so bad. I gave up on Rip Curl after 3 batteries developed loose connections after less than 15 hours use. I have substantial experience with Thermalution where the loose connections tend to arise in the suits themselves and if it wasn't for the hassle-free replacement guarantee offered by heatedwetsuits.com I would have given up on that too. I regard it as a leasing agreement where I'm willing to buy a new suit every year that I can send back for replacement as necessary. As regards functionality, Thermalution is excellent. The low setting on Thermalution is decidedly warmer than the high setting on Rip Curl. I swim about one kilometer 100 times per year and for three months per year, the water is zero degrees Celsius. With Thermalution under a good wetsuit I greatly enjoy each and every session.

  3. Extends the Surfing Career of an Old Man

    Posted by Roland Wrinkle on 3rd Feb 2017

    They probably don't sell a lot of heated wetsuits in Southern California (although I did see another Thermalution vest once) but I’m 67 years old and we go surfing in Ventura (which is a little up North) in the winter and I get really cold. I put the vest on while I’m still inside the truck and while it’s still dark and windy and freezing outside and I feel better about changing into my wetsuit outside. It works fabulously and makes things much more tolerable. For the days before we would go in the cold, I would worry about it but, having the vest, soothes me psychologically. I just bought my second one.

  4. Wet suit or dry suit it worked well . Started a swim without it on ,once I started to get shill I turn it on. Boy that was nice started to warm up in less than a minute. All I can say is try it.

    Posted by capt mike dunn on 30th Jan 2017

    Great ,I was nice and warm. We do Manatee Tours and do not move much, So we do get shilled in the water. This was the answer.

  5. I'm 65 years old and have been surfing 53 years, now I need the extra heat !

    Posted by Unknown on 12th Jun 2016

    Guys this has and will add a whole bunch more years to my surfing out here on the Central Coast of California, like I said I'm 65 and surf in water that's in the 50's. The first time in I surfed 3.5 hours and the way the heat is transferred to the upper and lower back, is right where it's most needed. Only needed the lower setting, and shoulders and lower back were not tight due to loss of body heat, just love the stoke !!
    Truly great product and feels so good to have that extra warmth!

  6. Great product

    Posted by JG on 5th Apr 2016

    I went from wearing a 5/4 to a 3/2 in winter. More mobile and warmer!

  7. Heated shirt

    Posted by Jeff Hawkins on 1st Feb 2016

    this is the best I am wearing a 2 mm wetsuit in the middle of winter. I am plenty warm on the low setting


    Posted by Bruce on 22nd Dec 2015

    I have only used it twice so far, but I know that I am going to surf much farther into the cold weather because of it. I used it on the low setting in mid 50 degree water. My back stayed warm and when my suit was flushed with cold water it warmed my back up again very quickly. I hate the walk back to the car from the ocean after surfing when it is cold - I freeze! The undersuit kept me warm for the walk and while I changed in to dry clothes- it was the last part of my wet gear that I took off. It does everything as advertised, starts heating up immediately, batteries last at least two hours (on low) and it is comfortable. The batteries are definitely placed in the right locations - i never hit them with my arms while paddling. The only thing I am not crazy about is having to keep the temperature controller hanging outside of my wetsuit. I kept it close to my neck and it got flushed inside down my back which was okay because I did not need to change the settings. I plan to fashion a pocket on the outside of my wetsuit (using lycra and seam sealer)to keep it in place.

  9. Great Product!

    Posted by Matt Lowcher on 14th Dec 2015

    Heated surf shirt fit well and is comfortable. I haven't tried it in cold water yet but in 55 degree water under a 2 mil. suit it worked very well.

  10. Love the vest

    Posted by paul on 13th Dec 2015

    i live and surf in Santa Cruz California. I have gone thru 2 rip curl heated vests over the past 3 years. Usually I'm surfing 4-6 times a week using a heated vest 85% of the time. The Thermulation vest is less intrusive than the rip curl, heats up quicker, stays warm longer and I have not needed any setting beyond low. I love it once I'm in the water. The only reason I gave it 4/5 stars is due to its set up time and I question how long some of the components will last. I think as long as you are careful and take your time connecting, donning, removing and unconnecting the vest and its components you'll be ok. Unfortunately time, cold and environment dictate the amount of dexterity you have in your hands and limbs and I worry the some of the connectors and the thinness of the skin may not stand up to time with regular use. Other than that I love it.

Showing reviews 1-10 of 56 | Next

Product Videos

Heated Wetsuits - Thermalution Battery Heated Rash Guard 15m (01:13)
Thermalution's Heated Rash Guard or Vest is the warmest heated wetsuit product in the world. Used kayaking, surfing, kiteboarding, or any other water sport, this is the most advanced way to stay warm in your wetsuit or dry-suit. The 70M model is a almost identical heated rash guard that is waterproof to 200ft, helping scuba divers and free divers stay warm underwater.Here is a quick video showing the basics to the Thermalution 15M model. Found at http://www.heatedwetsuits.com
  • Heated Wetsuits - Thermalution Battery Heated Rash Guard 15m
    Thermalution's Heated Rash Guard or Vest is the warmest heated...

Warranty Information

Peace of Mind Guarantee
Offered through HeatedWetsuits.Com: 1-year "BRAND NEW REPLACEMENT" Warranty
Offered exclusively on products purchased through HeatedWetsuits.Com.
If you buy from us and it breaks during the first year, send it back to our return team. We will replace it with a a BRAND NEW replacement suit and/or batteries to get you warm and back on the water as quickly as possible.
Petatech International Company, Ltd (Makers of Thermalution) offer a 12-month Limited Manufacturer's Warranty from the date of purchase from any retailer worldwide.  This warranty covers any Defective Materials or Components and Faulty Workmanship for one year.  Thermalution also offers a 6-month warranty on all batteries and components.  Customers may register their Thermalution products online for a full year manufacturers warranty on the batteries as well.