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BZ400X Mens Undersuit

Regular price £355.00 £355.00 Sale SKU: 57926-1

Rated 5.0 out of 5
1 Review

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Santi BZ400X Mens Undersuit
Santi BZ400X Mens Undersuit Santi BZ400X Mens Undersuit

BZ400X Mens Undersuit

Regular price £355.00 £355.00 Sale

Rated 5.0 out of 5
1 Review

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BZ400X Mens Undersuit

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BZ400X Mens Undersuit

Regular price £355.00 £355.00 Sale In Stock

Brand: Santi

Model: BZ400X Mens Undersuit

SKU: 57926-1

Please note: This item cannot be shipped outside the European Union - learn more

The Santi BZ400X Mens Undersuit is one of the warmest on the market today for it's size. Made for diving in waters below 7°C the BZ400X is ideal for the demanding diver that needs warmth without bulk that has been tried and tested by industry leaders.


Warm Without Bulk

The internal lining is a soft 140g/m2 micropolar fleece that is comfortable against your skin or your base layer. The outer shell is made from 6.6 Polyamide that has polyester reinforcing in key areas for durability. These two layers surround the internal Thinsulate™ that is quilted to prevent cold patches forming by holding all layers together.

Together weighing 420g/m2 and a warmth rating of 1.8clo the BZ400X is incredibly warm for the cold water diver.



Elasticated gussets under the arm and around the waist allow full range of movement without restriction for whatever you need to do in the water.

Prefabricated holes through the suit are located to integrate heating cables for gloves and vests in the chest and a P-Valve down the thigh.

Suspenders, thumb loops and a wide elastic stirrup strap combined with the anatomic shape of the suit hold the suit in the correct position in the water without riding up in any areas.


3 pockets including inside pocket,
water-resistant cuffs,
tapes, which supply air to the dry gloves,
banded collar,
two-way zip,
reinforcing patches on knees, arms and back made of polyester,
in waist - elastic gusset made of windproof fabric,
waist belt,
elastic gussets in arms,
wide (10 cm) elastic ankle bands,
p-valve and heating cords holes in standard,


Thinsulate™ Insulation,
weight: 420g/m2, warmth: 1,80 CLO

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We offer free standard delivery on orders over £50.

Standard delivery is £3.95 for orders under £50. You will receive your order 2 - 4 days from the date of despatch. Order by 3pm on a working weekday and we will aim to despatch the same day.

Next Working Day is £6.95.

Learn more about delivery

We hope you will be completely satisfied with any product purchased from Simply Scuba.

However, you can return it for any reason within 28 days from the date of despatch for a full refund (less postage costs).

Royal Mail tracked return option within the UK for your convenience.

Learn more about returns
average rating 5.0 out of 5
Based on 1 review
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100% of reviewers would recommend this product to a friend
1 Review
Rated 5 out of 5
Review posted

Incredibly warm

Incredibly warm, kept me warm in my membrane suit in the winter months. Internal suspenders are a bit odd but easily overlooked by how warm the suit is and pockets to keep your stuff in between dives

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