Undersuit KWARK Navy Extreme 

Premium Dry Suit Undersuit

The KWARK Navy Extreme Undersuit is the ultimate addition to your scuba diving gear, engineered for laminate dry suits and the coldest of UK waters. Originally custom-made for U.S. Army special-forces divers, this high-performance undersuit delivers unmatched thermal protection, flexibility, and comfort on every dive.

Key Features & Benefits

• Special-Forces Grade Material
  Crafted from 400 g/m² Thinsulate, the Navy Extreme matches the warmth of the classic KWARK Navy plus vest combination, without the bulk. Perfect for long dives in sub-5 °C conditions.

• Enhanced Flexibility
  Thinner warming panels preserve full range of motion—no stiffness or “armour” feel—so you can fin, twist, and reach with ease.

• Lightweight Design
  At under 1.4 kg, this undersuit trims your overall weight by at least 2 kg versus traditional warmers, making it one of the best diving gear upgrades for weight-conscious divers.

• Superior Moisture Management
  Wicks sweat away from the body and provides excellent airflow, keeping you dry during surface intervals and descent.

• Rapid Drying & Easy Care
  Even fully flooded, the Navy Extreme dries in hours when hung vertically. Machine-washable and spin-safe with durable flat seams—no limit to wash cycles.

• Antibacterial Treatment
  Trusted to resist odours dive after dive, so your gear stays fresh.

• Standard & Optional Openings
  Comes ready for P-valve and electric-heating hookups. Women’s version available with an extra comfort opening for easy restroom use.

Technical Specifications

Who It’s For

Whether you’re a recreational diver braving the chilly North Sea, a technical diver exploring deep wrecks, or a professional instructor leading cold-water courses, the Navy Extreme Undersuit is your go-to choice. Its blend of warmth, flexibility, and lightweight design makes it perfect for:

• Beginners seeking reliable UK diving equipment to stay comfortable on first cold-water dives

• Advanced & Technical Divers requiring extended thermal protection during prolonged sub-surface excursions

• Commercial & Professional Divers who demand gear that withstands repeated use and heavy washing

Why UK Divers Choose the Navy Extreme

As one of the best diving gear pieces for cold-water enthusiasts in the UK, the KWARK Navy Extreme Undersuit delivers:

1. Proven Field Performance – Trusted by elite military divers

2. Optimised Fit & Function – No rolling down, easy don/doff

3. Long-Term Durability – High-quality materials and seams

Get Yours Today

Upgrade your diving gear and conquer the cold with the KWARK Navy Extreme Undersuit. Available now at No Gravity Divers, your premier source for scuba diving equipment in the UK.

Shop now or contact us for expert advice on sizing and compatibility with your dry suit setup!

Delivery Information

All orders of the KWARK Navy Extreme Undersuit are dispatched promptly and delivered across the UK within 10–15 working days, ensuring you receive your new thermal undersuit in time for your next cold-water adventure.

Below we provide size guides used at Kwark.

In our chart, unisex sizes are described as XS, S, M, L, XL and XXL. These clothes can be both for men and women.