The BZ420X Heated Undersuit is an advanced version of SANTI’s flagship model, designed to deliver even more warmth and comfort during drysuit diving. With improved materials and construction, it ensures outstanding thermal protection even in extreme diving conditions.

What’s new in the BZ420X?

• Even warmer: Thicker, high-quality insulation for superior heat retention.

• More efficient heating: Redesigned cable layout ensures even heat distribution.

• Easier to put on: New smooth inner lining makes donning and doffing effortless.

• Improved quilting: “Brick” pattern increases flexibility and fit.

Part of the SANTI Heating System, consisting of at least the heated undersuit, SANTI Thermovalve or SANTI Connector, and an external battery. This setup allows divers to enjoy warmth safely without internal batteries.

Expected Operating Time:

• 24Ah battery: 3h

• 14Ah BluePower battery: 1h 30min

• 28Ah BluePower battery: 3h

Specifications:

• Weight: 2.6 kg [Men’s L]

• Grammage: Inner 290 g/m²; Outer 420 g/m²

• Sizes: 16 men’s, 12 women’s, Made-to-Measure available

• Works only with SANTI Thermovalve and Connector

• Max heating temp: 45°C

• Heating power: 110W

• Overheat and overcurrent protection

• Heating zones: torso, thighs, arms

• Retains insulation even when off

• Flexible waterproof connector compatible with SANTI products

• Extra cable pocket and glove connectors in sleeves

• Elastic waistband and P-valve openings on both sides

• Two-way zipper, water-resistant cuffs with air-release straps

• Color shades may vary slightly from screen