Extreme Watersport

SANTI Heating Vest Flex 2.0

The SANTI Heating Vest Flex 2.0 is a lightweight heated drysuit vest designed to provide active core warmth without the bulk of a full heated undersuit. Worn beneath your drysuit undersuit, it adds targeted heating around the torso, making it ideal for technical, CCR, recreational and cold-water diving where maintaining core temperature is essential.

As part of the SANTI external battery heating system, the vest is designed to work with a SANTI Thermovalve or Connector and an external battery. This setup keeps the battery outside the drysuit while delivering controlled warmth for long dives, decompression stops and cold-water conditions throughout Melbourne, Victoria and Australia.

55W Active Core Heating External Battery System Lightweight 0.7kg Design
SANTI Heating Vest Flex 2.0

Choose Your Size

$699.00
Most SANTI Heating Vest Flex 2.0 units are supplied to order directly from SANTI. Please allow approximately 6–10 weeks if your preferred size is not currently available. Contact us for current availability, sizing advice or compatible battery system options.
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Product Highlights

Targeted Core Heating Without Full-Undersuit Bulk

The Heating Vest Flex 2.0 is designed for divers who want active warmth focused around the body core. Instead of replacing your existing thermal undersuit, it adds a lightweight heated layer beneath your drysuit system, helping maintain warmth during long dives, decompression stops and cold-water exposure.

With flexible heating wires, adjustable side and crotch straps, a P-valve hose opening and a compact design, the vest integrates cleanly into recreational, technical and CCR diving setups while keeping the external battery outside the drysuit.

Key Features

Key Features

Active Core Warmth

55W heating output provides targeted warmth around the torso for cold-water drysuit diving.

External Battery Compatible

Designed for use with SANTI Thermovalve or Connector and compatible external battery systems.

Flexible Heating Wires

New-generation heating wire with soft silicone insulation improves flexibility and durability.

Adjustable Fit

Side and crotch elastic adjustments help stabilise the vest beneath your drysuit undersuit.

Technical Details

Technical Specifications

The SANTI Heating Vest Flex 2.0 is a lightweight active heating layer designed to add targeted core warmth beneath a drysuit undersuit. It forms part of the SANTI external battery heating system and is ideal for divers wanting active heating without committing to a full heated undersuit.

Heating Power
Maximum heating power: 55W.
Heating Temperature
Maximum heating temperature: 45°C.
Battery Runtime
Approx. 1 hour with 9Ah, 3 hours with 14Ah BluePower, or 6 hours with 28Ah BluePower battery.
Power System
Requires SANTI Thermovalve or Connector and compatible external battery.
Weight
Approximately 0.7 kg in size L.
Safety Features
Safety switch helps protect against overheating and excessive current.
Construction
Flexible silicone-insulated heating wires with heat-resistant synthetic power cable.
Fit Adjustment
Adjustable side and crotch elastic straps for circumference and length adjustment.
Sizes
Available in XS, S, M, L, XL, 2XL and 3XL.
Included Bag
Special vest storage bag included.
Included

What's Included

  • SANTI Heating Vest Flex 2.0

External battery, SANTI Thermovalve and SANTI Connector are sold separately unless otherwise stated.

Size Guide

Need Help Choosing Your Size?

Use the size guide below as a reference before ordering. If you are between sizes or plan to wear additional base layers, contact us and we can help recommend the most suitable fit.

Men’s Size Guide

SANTI Heating Vest Flex 2.0 men’s size guide

Women’s Size Guide

SANTI Heating Vest Flex 2.0 women’s size guide

Why Choose the SANTI Heating Vest Flex 2.0?

The SANTI Heating Vest Flex 2.0 is designed for divers who want active warmth focused where it matters most: the body core. Instead of replacing your entire drysuit undersuit, it adds a compact heated layer beneath your existing thermal system, helping maintain warmth during long cold-water dives, decompression stops and low-activity phases underwater.

With 55W maximum heating power, flexible heating wires and a lightweight 0.7 kg design, the vest provides a practical way to upgrade your current drysuit layering system without the additional bulk of a full heated undersuit.

Built for Melbourne and Australian Cold-Water Diving

For divers in Melbourne, Port Phillip Bay, Victoria, Tasmania and other cold-water environments across Australia, core warmth can make a major difference to comfort and focus underwater. The Heating Vest Flex 2.0 is especially useful for shore diving, boat diving, CCR diving and technical profiles where long periods of reduced movement can make divers feel colder.

Part of the SANTI External Battery Heating System

The Heating Vest Flex 2.0 is designed to work with the SANTI Thermovalve or SANTI Connector and an external battery. This keeps the power source outside the drysuit while providing reliable active heating through a waterproof plug and durable heating cable system.

Heating Vest vs Heated Undersuit

The Heating Vest Flex 2.0 is ideal if you already own a drysuit undersuit and want to add targeted core warmth. A heated undersuit such as the SANTI Heated Flex 2.0 or BZ420X Heated provides more extensive heating coverage across the body, including the arms and thighs. The best choice depends on your dive duration, water temperature, budget and how much active heating coverage you need.

Why Buy from Extreme Watersport?

Extreme Watersport is an authorised SANTI dealer in Australia, supplying genuine SANTI heating systems with practical advice from experienced cold-water and technical divers. We can help you compare the Heating Vest Flex 2.0 with SANTI heated undersuits, batteries, Thermovalves and Connectors to build the right heating system for your drysuit diving.

FAQ

SANTI Heating Vest Flex 2.0 FAQ

Who should choose the SANTI Heating Vest Flex 2.0?

The Heating Vest Flex 2.0 is ideal for divers who want active core warmth without wearing a full heated undersuit. It suits recreational, technical, CCR and cold-water divers who already have a suitable drysuit undersuit and want extra warmth around the torso.

Does the SANTI Heating Vest include a battery?

No. The vest is designed to work with the SANTI external battery heating system. Battery, Thermovalve and Connector options are sold separately unless specifically included in a package.

How long does the Heating Vest Flex 2.0 run?

Expected runtime depends on the battery used. SANTI lists approximately 1 hour with a 9Ah battery, 3 hours with a 14Ah BluePower battery and 6 hours with a 28Ah BluePower battery.

Can I wear the vest under my existing undersuit?

Yes. The Heating Vest Flex 2.0 is designed to be worn as part of your drysuit layering system, adding active core warmth beneath your existing thermal undersuit.

Heating Vest vs Heated Flex 2.0: which should I choose?

Choose the Heating Vest Flex 2.0 if you want targeted core warmth while keeping your current undersuit. Choose the Heated Flex 2.0 undersuit if you want active heating integrated across the torso, arms and thighs in a complete lightweight heated undersuit.

Is the Heating Vest suitable for technical and CCR diving?

Yes. The Heating Vest Flex 2.0 is well suited to technical and CCR divers who need extra core warmth during long dives, decompression stops or low-activity phases underwater.

Need Help?

Need Help Building Your SANTI Heating System?

The Heating Vest Flex 2.0 must be paired with the correct SANTI Thermovalve or Connector and compatible external battery. Our team can help you choose the right vest size, battery capacity and heating setup for your drysuit, undersuit and dive plans.

Contact Us for Advice