Santi Extreme BZ400X Undersuit



Santi Extreme BZ400X Undersuit

The Santi Extreme BZ400X Undersuit is the warmest Thinsulate undersuit Santi makes and one of the highest quality garments on the market.  It is designed for diving in water temperature less than 45 degrees/7 degrees Celsius. BZ400 is also ideal for long deep diving, with a decompression requirement.

Santi have put the best materials and technologies available into producing this awesome Drysuit Undersuit.

Thinsulate BZ insulation is recommended by 3M as optimal for diving undersuits, because it is compressed and do not take too much space under the suit. It also has a net layer, which make the undersuit even more durable and practically indestructible. The lining is made of soft micropolar 190 gr.

The outside layer is made of 6.6 Polyamide 100% additionally reinforced with polyester fabric in the areas exposed to damage.

In this model we used also good solutions from other versions, like elastic gussets in arms and waist, wide ankle bands and water-resistant cuffs with tapes, which supply air to the dry gloves.

Key Features:

New Ergonomic Design for better range of motion
2 P-valve openings
2 openings/flaps in stomach area for easy routing of wires for a heated vest
Available in Black and Red or all Black
Three pockets – one of them fastened
Wide (4 in /10 cm) elastic ankle bands
Water-resistant cuffs
Tapes, which supply air to the dry gloves
Banded collar
Two-way zip protected with a flap
Reinforcing patches made of polyester
Elastic gussets in arms
Thinsulate™ Insulation
In waist – elastic gusset made of the fabric protecting from the wind

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.

Please allow a minimum of 6 weeks for modified stock suits and a minimum of 3 months for a full custom garment.

Buy Santi Diving Drysuits, Underwear and Accessories Online in Canada from Dan’s Dive Shop, a top stocking Santi Premium Dealer. Ships Free.

Additional information

Weight 8 kg
Dimensions 46 × 46 × 30 cm

Custom Fit Upgrade, Double Extra Large, Double Extra Large Short, Double Extra Large Tall, Extra Large, Extra Large Short, Extra Large Tall, Extra Small, Large, Large Short, Large Tall, Medium, Medium Large, Medium Large Short, Medium Large Tall, Small, small short, Small Tall, Triple Extra Large


Ladies, Mens


Black, Charcoal, Green, Pink, Red


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