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Undersuit BZ420X
The Santi BZ420X is the ultimate evolution of the best-selling BZ400X drysuit undersuit, specifically redesigned to offer superior thermal insulation for the coldest diving environments. Featuring advanced Thinsulate™ BZ400 insulation by 3M combined with Thermo Pile, this undersuit delivers an impressive 1.80 CLO warmth rating, keeping you comfortable in water temperatures ranging from 0°C to 17°C for up to 1.5 hours. Engineered with a focus on maximum mobility and utility, the BZ420X includes smart details such as shoulder and knee gussets, rubber thumb loops for dry glove airflow, and pre-cut ports for heating systems and dual P-valves. It is the perfect choice for demanding technical and cold-water divers who refuse to compromise on warmth or comfort.
Technical Specifications
- Material: Thinsulate™ BZ400 by 3M / Thermo Pile
- Water temperature range: 0–17°C (comfy for 1.5 hours)
- Warmth: 1.80 CLO
- Grammage: 420g/m² / 220g/m² / 196g/m²
- Weight: 2.1 kg (size L)
- Two-way front zip and three pockets (two side, one inside chest)
- Elastic gussets on shoulders, knees, and waist for maximum mobility
- Pre-configured openings for 2 P-valves and 1 heating system
- Wide 10 cm elastic ankle bands and rubber thumb loops
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