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Fourth Element X-Core Women's Vest - Size M/12

Fourth Element
$231.00 Sale:$212.52


The X-Core Ladies Vest is Fourth Element's answer to the electrically heated vest or undergarment. Utilising the body's own heat output and retaining it, weight for weight the X-Core is Fourth Elements warmest undergarment yet. Pair it with an Arctic, Halo 3D or Arctic Expedition undergarment to experience warmth without batteries or wires.

Designed to be used as part of the Fourth Element drysuit undergarment layering system

The sleeveless design of the vest minimises impact on buoyancy and overall bulk especially in the shoulders and arms where freedom of movement is critical. The four-way stretch fabric combined with long body design ensures a snug fit, minimising cold points. The additional chest panel helps to minimise the rush of cold air from the inlet valve of drysuit and provides extra thermal protection in a key exposure area. The fast-wicking fabric moves perspiration towards the outer surface, keeping the wearer drier and warmer.

The physiological response to cold stress is to reduce blood flow to the periphery and look after the body core, where it can often just be a matter of time before cold becomes the limiting factor in the safety and enjoyment of a dive. X-Core provides extreme thermal protection to the core, enabling longer, more comfortable dives. Designed to be worn under the Arctic, Arctic Expedition, Halo 3D or any other drysuit undergarment, X-Core augments thermal protection to the extent that electric heating can be avoided in many instances. It performs best over a lightweight base layer such as J2 or Xerotherm, but the X-Core can also be worn as a next-to-skin garment for critical core protection.

Ocean Positive:

More than 8 million tons of plastic are dumped in our oceans every year, endangering marine and bird life and creating almost unfathomable areas of pollution, from local watercourses to vast plastic gyres. Reducing the plastic, we discard is part of the solution to improving the health of our oceans. X-Core is made with REPREVE™, a fibre that is made from recycled post-consumer waste, including used plastic bottles. Plastic is removed from the waste stream and prevented from reaching the ocean. 76% of the fibre composition of X-Core is recycled polyester. The Polartec™ fabric used in X-Core is manufactured to the highest environmental standards. It has Blue Sign™ and Oeko-Tex™ certification to indicate that harmful chemicals are minimised or eliminated, and that wastewater is treated to ensure its purity before being released from the factory. Odour-resistant, machine washable and is made from 76% recycled polyester / 16% polyester / 8% elastane.

The Fourth Element X-Core Women's Vest is available in multiple sizes.

Fourth Element X-Core Women's Vest Features

  • Answer to Electrically Heated Vest or Undergarment
  • Utilising Body's Own Heat Output and Retaining It
  • Weight for Weight X-Core is Fourth Elements Warmest Undergarment Yet
  • Pair with Arctic, Halo 3D or Arctic Expedition undergarments
  • Experience Warmth without Batteries or Wires
  • Sleeveless Design:
    Minimizes Impact on Buoyancy
    Reduces Overall Bulk Especially in Shoulders and Arms
    Provides Freedom of Movement
  • 4-Way Stretch Fabric and Long Body Design Ensures Snug Fit, Minimising Cold Points
  • Additional Chest Panel: Minimise Rush of Cold Air from Inlet Valve of Dry Suit
  • Provides Extra Thermal Protection in Key Exposure Area
  • Fast Wicking Fabric:
    Moves Perspiration Towards Outer Surface
    Keeps Wearer Drier and Warmer
  • X-Core Provides Extreme Thermal Protection to Core
  • Enabling Longer, More Comfortable Dives
  • Performs Best Over Lightweight Base Layer Such As J2 or Xerotherm
  • Can Be Worn as Next-to-Skin Garment for Critical Core Protection
  • Ocean Positive:
    8 Million Tons of Plastic Dumped in Our Oceans Every Year
  • Endangering Marine and Bird Life and Creating Unfathomable Areas of Pollution Reducing Plastic, We Discard is Part of Solution
  • X-Core is Made with REPREVE™
    Fibre Made from Recycled Post-Consumer Waste
    76% of Fibre Composition of X-Core is Recycled Polyester
  • Polartec™ Fabric Used in X-Core is Manufactured to Highest Environmental Standards
  • Blue Sign™ and Oeko-Tex™ Certification to Indicate Harmful Chemicals are Minimised or Eliminated
  • Odour Resistant
  • Machine Washable
  • Fabric: 76% Recycled Polyester / 16% Polyester / 8% Elastane
  • Available in Multiple Sizes

Fourth Element Women's General Sizing Charts


Women's Wetsuit MeasuringFourth Element is changing how they identify women's garment sizes. They've listened to customer feedback and believe this change will make it easier to identify the size you need and improve your experience overall.

Moving to a universal system (XS, S, M, L etc) from a number system (UK12, US10 etc) will ensure that you can find your perfect size whether you are shopping online or purchasing from our dive store.

During the transition period we will sell garments labelled with either old or new sizing. This might lead to you receiving an item labelled with a different size to your order. Don't worry! The measurements match according to the size guide and you will receive your order with the fit that you want.

Use the tables below as a guide to help select which size product best suits your body type.

Fourth Element Women's New Universal Sizing

Universal Height
cm (a)
cm (b)
cm (c)
cm (d)
Inside Leg*
cm (f)
XXS 160-168 68-76 51-59 76-84 71-75
XS 163-170 74-82 57-65 82-90 73-77
S 165-173 80-88 63-71 88-96 75-79
M 168-175 86-94 69-77 94-102 77-81
L 170-178 92-100 75-83 100-108 79-83
XL 173-180 98-106 81-89 106-114 81-85
XXL 173-180 104-112 87-95 112-120 81-85
XXXL 173-180 110-118 93-101 118-126 81-85

* Inside Leg Measurements are taken from the crotch to the floor.

Womens Comparison Size Chart

Universal UK/AU USA Germany France/Spain Italy
XXS 6 2 32 34 38
XS 8 4 34 36 40
S 10 6 36 38 42
M 12 8 38 40 44
L 14 10 40 42 46
XL 16 12 42 44 48
XXL 18 14 44 46 50
XXXL 20 16 46 48 52

Note: This item cannot be delivered outside of Australia.

(04/22 AJG)

The Scuba Doctor Australia
Boon Wurrung Country
1/49 Peninsula Ave
Rye Victoria 3941, Australia
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