Saros SFT

The Saros SFT undersuit / undergarmit is the the next step towards ultimative warmth. It was developed as a modular underwear system in combination with the thermal underwear V-Warm SFT Arctic Fleece.

Saros SFT Drysuit Untergarmit

The superglide interior material has been perfectly engineered to match the V-Warm SFT Arctic Fleece thermal underwear. So you slide easily in and out of the undergarmit.

Kallweit Online Shop

Our online store has all products and sizes available for you 24/7.


* in combination with the V-Warm SFT Arctic Fleece thermal underwear.

Maximum Climate Regulation

The Nexus SFT and V-Warm thermal underwear have completed numerous test dives in icy temperatures.

Men and Women models

Specially designed measures for women and men in all standard sizes.

Superpress Isolation

The compressed superpress-material generates less buoyancy - so you need less weights!

4 Pockets

1x breast pocket with zipper, 2x leg pocket, 1x inside pocket.

Zip Cover

Secure zipper cover.

V-Warm Ready

Maximum warmth combined with V-Warm SFT Arctic Fleece thermal underwear.

Flow Control System

FCS on both arms for easy buoyancy and freedom of movement.

Bi-elastic KT Proof Softshell

Water-repellent and quick-drying surface.


Flexfit foot and arm straps: slipping was yesterday!