Santi Heated Flex 2.0 Undersuit
Dispatched in 4 to 8 weeks
Stay warm with the Santi Heated Flex 2.0 Undersuit. This flexible, low-bulk undersuit offers a maximum heating temperature of 45ºC for divers.
Gender
Santi Heated Flex 2.0 Undersuit
The Santi Heated Flex 2.0 Undersuit offers a thinner, more flexible alternative for divers seeking less bulk. It works perfectly for shorter dives in cold waters or long, demanding dives in warmer environments.
Thanks to the Climashield Contour fabric, Santi heated suit allows for full flexibility in every direction. Consequently, you experience unique mobility and a streamlined profile compared to the heavier BZ420X Heated Undersuit. This lightweight design ensures you stay agile while maintaining critical core warmth throughout your entire dive.
To power the internal heating wires, use the Santi Drysuit Connector or Thermovalve 303. Santi offers three battery options: Battery 9Ah, Blue Power 14Ah and Blue Power 28Ah.
Advanced Heating Efficiency
The Santi Heated Flex 2.0 Undersuit features highly efficient heating wires that deliver optimal thermal comfort during dives. Most of the generated heat passes directly to your body for maximum effectiveness.
Furthermore, the non-quilted fabric retains heat closer to your skin for much longer. This construction significantly improves thermal properties without adding unnecessary weight to your gear. As a result, you remain warm even when the heating is not on.
For the best results, wear a Santi heated undersuit over a thin thermal underlayer to direct heat toward your body safely. Additionally, a built-in safety switch prevents overheating and ensures a steady current flow.
Santi Heated Flex 2.0 Highlights
- Climashield Contour 180g/m2 insulation provides superior warmth and flexibility.
- Built-in heating glove wires allow for easy system expansion.
- Maximum heating temperature reaches 45ºC with 110W power output.
- Wires feature ultra-soft silicone covers to prevent breaking or damage.
- Two-way entry zipper and foot straps ensure a secure, comfortable fit.
- Handy pocket stores the power cord during transport or use.
- Features P-valve hose openings and elastic gussets for improved utility.
- Provides approximately 3 hours of heat when using a 28Ah battery.
- Available in men's and women's sizes or a made-to-measure option
Note: Batteries and connectors are not included and must be purchased separately. Never exceed 12V when operating this heating system.
Santi Heating Systems at glance
The Santi Heated Flex 2.0 Undersuit has been designed as part of the Santi heating system, which currently includes items such as the Santi BZ420X Heated Undersuit, Heated Vest Flex 2.0 and Heated Gloves.

FREE "Made to Fit"
Very few divers need a completely made-to-measure suit because Santi Diving offers a wide range of standard sizes. With this in mind, Santi provides a free Made-to-Fit service for any standard size Heated Flex 2.0 Undersuit ordered, tailoring the suit to a diver's measurements.
With your order, you can request up to 4 changes (ranging from 2 to 5 cm) to any of the standard size measurements listed under chest, inner arm, biceps, forearm, waist, hips, inner leg, thigh, calf or body trunk on the Santi size chart.
If you would require more than 4 changes to make your suit perfect, you can add two more changes for a small additional charge.
FREE "Made to Fit"
Very few divers require a totally made to measure suit due to the wide range of standard sizes available from Santi Diving. With this in mind, Santi offers a free of charge Made-to-Fit service to any standard size suit ordered, sculpting standard suits to a divers' measurements.
With your order, you can request up to 4 changes (ranging from 2 to 5 cm) to any of the standard size measurements listed under chest, inner arm, biceps, forearm, waist, hips, inner leg, thigh, calf or body trunk on the SANTI size chart.


UNDERWATER EXPLORERS LTD/DIRDIRECT DISCLAIMER:
It is the customers responsibility to choose a correct drysuit size. Modified undersuit returns are not accepted under any circumstance unless Underwater Explorers Ltd/DirDirect has made a mistake. We do not take any responsibility for a fit of suits unless measured by us.
HOW TO MEASURE YOURSELF FOR SANTI SUITS
Carefully watch SANTI's Instructions for Measuring video below. The video shows all measurements for made to measure suits. For standard size or Made-to-Fit measurements please use the Size Chart.
STEP-BY-STEP
Never take your own measurements yourself! Measurements should be taken by another person to make sure all measurements are taken tight up to the body and at correct placement for a specific measurement.
It is important that you stand straight, look forward and do not bend over while you are being measured. It is equally important to take the measurements only while wearing thin clothing, close to the body. Don’t leave any additional measurement allowance.
CHEST - on the widest point.
INNER ARM - from armpit to wrist.
BICEPS - widest point on the loose arm. If you have a visibly athletic figure it is advised to measure the biceps also with bent elbow.
FOREARM - in the widest point.
WAIST - measure on the belly button level. Remember to measure the waist line in the widest point on the belly button line. To measure a female waistline correctly, use any kind of "marker belt" and fasten it around the waist line.
HIPS - in the fullest point of the buttocks.
INNER LEG - hold one end of the measurement tape in the crotch and measure to the heel end.
THIGH - widest point approximately 5cm from the crotch area.
CALF - measure the calf at the widest point.
BODY TRUNK - hold one end of the tape on the central point of the neck end and lead the tape across the crotch to the back. Mark the place where tape ends and measure the rest of the line to the spine neck bone. Make sure the tape is close to the body including all the curves.
UNDERWATER EXPLORERS LTD/DIRDIRECT DISCLAIMER:
It is the customers responsibility to choose a correct drysuit size. Modified undersuit returns are not accepted under any circumstance unless Underwater Explorers Ltd/DirDirect has made a mistake. We do not take any responsibility for a fit of suits unless measured by us.
SHIPPING & RATES
You can find our current shipping rates in our Shipping Policy & Rates.
We aim to dispatch all in-stock items within 2 working days. The Dispatch Days listed in our product listings refer to working days.
We will inform you of approximate delivery times should any item on your order be out of stock or on supplier backorder due to current manufacturing or transport delays caused by global shortages and/or impeded production.
INTERNATIONAL EXCEPTIONS
Please contact us in advance for a shipping quote before placing an international order for weights, cylinders (excluding suit inflation bottles), and Suex scooters. These products are not included in our global max-capped shipping rates.
They are only shipped outside the UK mainland after the freight cost is calculated based on the parcel's total weight, dimensions, delivery location, and the courier service used.
RETURNS & REFUNDS
We offer a 30-day return for any product sold under our Returns & Refunds Policy.
Please email us at sales@dirdirect.com with your order number to receive our Returns Authorisation Form and instructions.
Return postages are at your own cost and our outbound shipping costs (if items are sold with integrated basic shipping charges i.e. Free shipping for orders above certain amount) the current UK shipping rate will be deducted from any UK mainland refund unless linked to a fault/defect claim.































