Santi BZ420X Undersuit — Ladies’ First (XS)

High-performance thermal undersuit designed for cold-water diving. It uses upgraded Thinsulate™ BZ400 by 3M combined with Thermo Pile 100 fleece to provide insulation without significant compression. Recommended operating range: 0°C to 17°C.

Key features

• Flexible fit: shoulder and knee gussets plus a waist-elastic gusset for unrestricted movement.
• Easy donning: two-way front zipper and a comfortable collar; rubber thumb loops and wide elastic ankle bands prevent the undersuit from riding up when dressing a drysuit.
• Storage: two side pockets and an internal left-chest pocket.
• Service provisions: designed to accommodate up to two p-valves and one heating system.
• Visibility: reflective tape for enhanced low-light visibility.
• Materials & weight: 420 g/m² insulation with 220 g/m² Thermo Pile fleece; approx. 2.1 kg (Men’s L).
• Options: available in both Men’s and Ladies’ First versions.

This undersuit delivers thermal protection, comfort, and mobility for extended cold-water diving sessions.