Santi Flex 360 Undersuit



Santi Flex 360 Undersuit

The Santi Flex 360 Undersuit features an advanced combination of innovative insulation fabrics and unique design, accompanied by PrimaLoft® which is the highest-performing insulation available on the market today.

Those divers who are spending time in the worst cold and wet weather or environmental  conditions,  or those looking for the pinnacle of comfort and performance should look no further than PrimaLoft® Gold Insulation which is used as the key component for the new Santi Flex 360 undersuit.

We now offer In Store Financing for your new Drysuit system. Click HERE for details.

PrimaLoft® Gold Insulation is highest performing synthetic insulation available.  It offers the diver 98% of warmth retention when wet. The ultimate in warmth-to-weight available in a synthetic is coupled with incredible packability and softness that mimics goose down. With famed PrimaLoft® water-repellency that delivers wet-weather protection and an easy care package, this is the no-compromise synthetic flagship for those who demand the best.

Available in 16 standard stock sizes:


Together with our suppliers Santi has developed a superior solution by research and development to double the fabric from 180 g/m² up to 360 g/m² under the condition that it will retain its stretch and flexibility, which are key factors for total comfort in diving. Our Flex360 Insulation fabric consists of three layers, breathable insulation fibers and polyester soft coating from the top, that is also wind-resistant.

Other materials used in this undersuit include PrimaLoft® Gold Insulation, Embossed Polar fleece (Double pique, 300g/m2, lamination) and 3D mesh spacer pads in the chest area.

General features:

  • great, soft feeling next to the skin
  • durable and lightweight
  • innovative, modern design
  • warmth without bulk
  • water-resistant
  • breathable
  • easy packing
  • superior softness
  • flexibility and mobility

SANTI offers the most innovative two piece diving undersuit consisting of body sleeves overall and a zipped jacket. The set is dedicated for cold water diving below 7 degrees. It is also ideal for long deep diving, with decompression.


This fine piece of clothing may be used as a standalone product. Its quality and design will make you stand out among your friends and will emphasize your relation with scuba diving passion.

PrimaLoft® Gold Insulation in the back and front sections is used for protection in extreme conditions. Microfibers trap body heat but retain top level of breathability. Flex 360 on external side of the sleeve combined with Flex180 on inner side guarantees ultimate flexibility. There is no choice between warmth and comfort anymore.

They simply go together.


  • Primaloft Gold Insulation fabric combined with Flex190 and 360 insulation quality fabric from Santi
  • wind resistand & breathable
  • fast drying
  • superior water reppelency
  • highest Thermal efficiency with no bulk
  • 2 side pockets
  • 2 inner pockets
  • 1 double chest pocket closed with zipper
  • 1-way front zipper
  • soft, elastic cuffs with thumb holes
  • velcro at the back to connect to overall


Made of Flex360 insulation fabric (legs), embossed Polar fleece 300 g/m2 (back) and Flex190 filled with 3D mesh spacers (front side). This mix of material guarantees that body warmth will be trapped and cold external elements will not be a threat at all.

3D mesh pads create a space inside the front panels (abdomen through chest) to make an air chamber that isolates body from the lowest and the coldest point when diving. There are two splash-proof zippers that enable to remove the spacers when undersuit is washed.


  • weight: 180g/m2 & 360 g/m2 with high end design fleece at the back
  • sleeveless top vest for additional chest protection
  • 2 side pockets
  • 2 back pockets
  • 2-way front zipper
  • elastic ankle straps
  • velcro to connect to Jacket
  • easy care while washing and drying
  • ergonomic cut for unlimited body movements

Alterations:  We have found that the large majority of our Santi Diving suit purchasers are able to fit one of our standard size rental or stock suits with just a few alternations or modifications and given that the standard size suits include up to four alterations at no charge, it is much more economical and easier for Santi to focus on this rather than trying to complete a full MTM suit for people that don’t really need it. This allows you, the customer to try a stock suit at DDS and see for yourself the areas that may need modification and removes some of the risk involved with complete MTM products. Please note that the four measurement changes are limited to 4-5 cm in each alteration.

Additional Discounts:

Buy Santi Drysuits and Accessories Online in Canada with Free Shipping from Dan’s Dive Shop, a Santi Premium Dealer.

Additional information

Weight 3 kg
Dimensions 36 × 24 × 16 cm

Double Extra Large, Double Extra Large Short, Extra Large, Extra Large Short, Extra Large Tall, Extra Small, Large, Large Short, Large Tall, Medium, Medium Large, Medium Large Tall, Small, Small Tall, Triple Extra Large


Ladies, Mens


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