• Thermalution Compact Dive Series (70M)
  • Image 2
  • Image 3
  • Image 4
  • Image 5
  • Image 6

Thermalution Compact Dive Series (70M)

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 230ft 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® Deep Diver 70m Undersuit is the world’s only first and only battery heated wetsuit product for scuba divers.  Tested to depths up to 250ft, the 70M Thermalution is the perfect tool to fight against the dreaded thermocline.  Powered by two 7.4 volt Lithium Polymer batteries and worn under your current scuba wetsuit, Thermalution® turns your existing wetsuit into a heated wetsuit!  As water enters the wetsuit on a dive, it circulates throughout your wetsuit and over the Thermalution.  This results in an increased water temperature in your wetsuit, keeping your core body temperature warmer, longer. 

Nearly identical to the core 15m model, the only difference lies in the temperature control unit, which is designed to withhold water pressures of up to 250ft below the surface!  Thermalution can be taken with divers on the longest and deepest of dives, helping to warm you when your body alone cannot produce enough heat to keep you warm throughout the dive.  With three levels of adjustable heat, your Thermalution heated wetsuit can be adjusted with the push of a button, giving you the warmth you need when you dive deep with the ability to turn off quickly for that warmer safety stop.


Similar to any base layer clothing (like Under Armor®) Thermalution Undersuits can be worn beneath any wetsuit, dry suit, or jacket. It's most effective to wear directly on your skin.

Wearing beneath a wetsuit

Thermal protection of a wetsuit is limited to insulate your body and minimize heat loss. The thicker the neoprene, the warmer you'll feel, but you may get extremely exhausted by putting a thick wetsuit on. With our Thermalution® Power Heated Undersuit, you can say good-bye to a thick wetsuit and enjoy a fun cold water sport with a thinner wetsuit, because Thermlation 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 Lithium Polymer batteries. Battery Size: 4x2x0.5 Inches.

These are the same type of batteries found in your mobile phone or mp3 player. 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 45 | Next

  1. Never Know if It is going to work

    Posted by Linda Kruszka on 19th Jan 2016

    My heated vest is great when it works. The last two times it worked great. I find the batteries do not hold the charge for as long as advertised. I have the setting on low. The last time, there was a flashing red light. Nowhere on the web site or in the materials I have tells me what this means. More FAQ's or tech support should be available. The idea is awesome, however there need to be some upgrades and tweaks.

  2. Guadalupe cage diving

    Posted by Unknown on 20th Dec 2015

    The white shark cage diving of Guadalupe Island in colder water and not generating much body heat I found this product great for keeping warm. Thanks

  3. Works Great!

    Posted by Unknown on 17th Nov 2015

    Does everything as advertised. Test it for power duration and at Low Heat, the batteries lasted 2 hours and 23 minutes. I have only used it twice, but it has functioned perfectly.

  4. Nice

    Posted by Unknown on 30th Sep 2015

    Kristi loves her shirt

  5. Theremalution 70M - only modestly warm

    Posted by Brad Wright on 27th Sep 2015

    I bought this recently and used it for the first time on a dive trip to Galapagos two weeks ago. I have to say I wasn’t impressed. I was wearing it under a 5mm wetsuit and while it provided some warmth it in no way provided me the kind of relief from the cold I expected. It was a small localized heat, even on high. For the price I expected a lot more.

    I’m unsure what to do with it now as it’s hardly worth the weight in baggage for the warmth it supplied.

    Another diver expressed the same feelings when diving wet. He however had the wireless one and could use it under a drysuit where he said it was considerably more effective.

    Overall I’m disappointed.

  6. works great but quality an issue

    Posted by Unknown on 26th Sep 2015

    I used the wet suit for 12 days of diving in the Maldives and it worked great. Really kept my core warm the whole time. However, the thread on both the battery pockets has broken. Not likely to last through another dive trip without repair. I showed it to a tailor and was told the product was made with the wrong stitch for the type of fabric and pockets need to be re-sewn with a stretch stitch to prevent future tearing. For a product this expensive the quality is unacceptable.

  7. Extended my diving options

    Posted by Ted on 16th Sep 2015

    Just used the heated shirt for the first time in a cenote dive in Mexico. I am alway the one who comes up cold and blue. This time I was warm and smiling while the others were shivering to get warm. The shirt will certainly allow me to do dives I could would not consider before. Before my trip I had some questions and customer support was prompt and thorough. Great product.

  8. Never Cold Again

    Posted by Richard on 11th May 2015

    I bought this just before a trip to Turks and Caicos, I did 5 dives per day and never got even a slight chill, never used anything but low heat setting. Good product.

  9. Great product

    Posted by Mark on 22nd Mar 2015

    Works great. Battery life could be longer. Keeps out the chill and allows for a longer more comfortable dive.

  10. Nothing like it

    Posted by Unknown on 25th Oct 2014

    Used by my 11 years old daughter in Monterey with a 7mm wetsuit. She operate it with no problem but we need to rent one size bigger wet suit to allow room for the batteries. The switch could pickup sand. Expensive but cheaper than dry suit.

Previous | Showing reviews 11-20 of 45 | 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.