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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

Previous | Showing reviews 11-20 of 56 | Next

  1. Heated shirt great for dry suit diving

    Posted by Peter deLannoy on 14th Feb 2015

    I have used this shirt on several dives in 50 degree water under my dry suit wearing my summer garments. The dives average one hour which is a significant increase in dive time under the same conditions without the shirt. The reason why I do not want to shift to winter undergarments is because I would have to readjust my sidemount harness which would have an adverse effect on the type of training I am doing at my dive site. The heated wet suit shirt is amazing!

  2. It works

    Posted by dave on 16th Dec 2014

    The only reason I am not giving 5 stars is that I have only used it twice, and don't know how durable it is or how long the batteries will last.

    On a 30 degree new england december day at sunrise, with 48 deg water, I had the vest on high for 1.5 hrs and it cranked heat the entire time. High was almost too much. Used it with an oniel pyrotech 4/3

    On a 42 degree, with 48 degree water, the low setting was almost too much.

    Expensive, but on a cold day will keep you in the water longer. Worth the money

  3. Best heated vest anywhere!

    Posted by Josh on 2nd Dec 2014

    I live in the New England area and water gets damn cold here! Have used a few of the "other brands" for heated vests. Nothing compares to this one! Heats right up! Easy to control! Highly recommend it to anyone who surfs, SUP's,kite boards!!!

  4. Great service

    Posted by Byron Sellers on 28th Nov 2014

    Thought I had an issue ( was on my end ) and they took it back right away to check for any probs then kept in touch all the way until I got it back .

  5. All I can say is

    Posted by kyle on 5th Aug 2014

    This rashvest is the best thing to keep you warm .went out when temp is -1 and was warm as toast.much better than others I have tried 5 stars.

  6. So far so good

    Posted by JSlim on 15th Jul 2014

    I have had my Thermalution for about 2 weeks now. So far battery life is good, it certainly lasts the 1-2 hours that I normally surf. I've been trying to keep the battery connectors clear (washing salt water off after every surf). My hands and feet have felt cold but the rest of me hasn't suffered. I love being able to turn up the heat if it is a cold and windy morning.

  7. Heats up super fast

    Posted by Unknown on 24th Jun 2014

    This vest heats up super fast, and retains heat for the advertised time. Really good quality product. You get what you pay for.

  8. Stay Toasty and Rock through the Hardest Winter!

    Posted by Mike Baker on 12th Jun 2014

    I have used my Thermalution Rash Vest bodysurfing in NZ 6 times now. We are moving in to winter here and people are paddling out with gloves and hoods. I am using an E Bomb Ripcurl 3/4 Steamer with 2ml fin socks and a Gath helmet with Go Pro camera mount and my Slyde Handboard so I am determined to be warm this winter. The first time I used my vest a couple of weeks ago I had to turn it off because I was too hot with it on the lowest setting. I bodysurfed for 4 hours two days ago and had it on low for the second hour and medium for the last two hours. It was still on after I came out of the water so that was on for three hours! The controller is a little tricky with fingers which are numb, but I managed ok. The test will be to keep me in the water through July and August coming up - our coldest months and I am anticipating using the hot setting, but so far ... I am absolutely stoked by this Thermalution vest`s capabilities! I cannot recommend this product highly enough! After reading the recent reviews of the three top brands, this vest comes out way on top and I can fully concur with the findings. Way to go guys!

  9. Great innovation

    Posted by Barlow on 8th Jun 2014

    Vest is an asset to surfing in cold water. It heats up very fast and provides enough heat that I had to turn the power to low several times. This is good because it prolongs battery life. It seems well constructed and was fairly comfortable underneath my 4/3 wetsuit. It's a little clunky but as battery technology improves I'm sure that the battery size will be reduced and will be less cumbersome. The heat is between the shoulder blades and a little down the back. In the future it would be nice if there were a much more even distribution of heat throughout a wetsuit including down the thighs and upper arms, but for now I highly recommend this product. It adds heat into your wetsuit and will make surfing cold water more enjoyable. (Santa Cruz, CA)

  10. Cannot without anymore...

    Posted by Unknown on 11th Mar 2014

    During our winter, we wouldn't wanna go into the water without it anymore. Really helps staying warm, thus allowing to reduce the wetsuit thickness. Long lasting battery power, easy and fast to charge. It'd be even nicer with the heating patch extending further down. Sometimes trouble with the controller after getting wet - very difficult to change levels. All in all, very satisfied with the gear and great service. Thanks guys.

Previous | Showing reviews 11-20 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.