The Fourth Element Xerotherm Vest provides extra warmth and thermal protection for your body core when layered underneath a Xerotherm or other drysuit undersuit. It does not increase bulk and keeps arms comfortably mobile during the dive.
The Fourth Element Xerotherm Vest is designed to be worn under another drysuit undersuit, or on its own under a neoprene drysuit. It provides astonishing warmth without contributing to bulk or buoyancy.
The Xerotherm is the ultimate base layer for use under a drysuit. Made using Polartec® Powerstretch® which was originally developed for NASA, the Xerotherm traps a layer of air — a much better insulator than water — next to the skin, keeping the wearer drier and more comfortable.
Xerotherm - Fast Wicking Baselayer
The knit of the xerotherm fabric produces the fastest wicking effect of any of the products in the fourth element product range. Moisture is drawn out through the fabric along fine fibres and then spreads out over the outer surface. This maintains a thin layer of air (a more efficient insulator than water) next to the skin. This is so effective in the xerotherm that some wearers report experiencing minor suit leaks during the dive without even noticing until after the dive.
"The performance is superb." This was the reaction of Doug Allan, world renowned and award-winning underwater filmmaker and author after testing the Xerotherm in -2 degree Centigrade (29°F) water inside the Arctic Circle in Svalbard, whilst shooting sequences for the BBC production The Blue Planet.
The Fourth Element Xerotherm represents the ultimate in base layer performance, unrivalled by anything else on the market. Since Doug's testing, the xerotherm has been to the top of Everest and down to the Titanic, as well as being specified by the FBI Dive Teams, Norwegian Navy and British Police Diving Units.
Xerotherm is Machine Washable
Machine wash cold. Line dry. Do not use bleach. Do not iron. Do not tumble dry. Can be dry cleaned. Avoid use of fabric softeners.
Fourth Element Xerotherm Vest Features
- Ultimate Base Layer for Use Under a Dry Suit
- Polartec Power-Stretch: Originally Developed for NASA
Traps Layer of Air
Much Better Insulator than Water, Next to Skin
Keeps Wearer Drier and More Comfortable
- Unisex Range: Designed to be Worn Under Another Under Suit
- Single Layer Under Neoprene Dry Suit:
Provides Astonishing Warmth
Won't Contribute to Bulk or Buoyancy
Rarely Impact on Weight Configuration
Dramatically Improves Warmth
- Xerotherm Fabric:
Fastest Wicking Effect of Fourth Element Range
Moisture is Drawn Out Thru Fabric Along Fine Fibers
Spreads Out Over the Outer Surface
Maintains Thin Layer of Air Next to Skin
More Efficient Insulator than Water
- So Effective, Minor Suit Leaks Not Noticed
- Machine Washable
Xerotherm Size Charts
Use the table below as a guide to help select which size Xerotherm baselayer best suits your body type.
If you require any further assistance/advice please don't hesitate to contact us.
Fourth Element Xerotherm Sizes
Order In Item:
This is not a regularly stocked item in our Rye dive shop. It will be ordered for you from the manufacturer, typically resulting in a 2-3 day delay.