Milwaukee M12 Black Axis Heated Vest Kit, Small

Milwaukee M12 Black Axis Heated Vest Kit, Small

The Milwaukee M300B-21S M12™ AXIS™ Heated Vest Kit is a lightweight, durable heated vest designed to deliver fast, consistent warmth without restricting movement. Powered by HEXON HEAT TECHNOLOGY™, it heats up quickly, stays warmer longer, and provides broader heat coverage across the core. Built with AXIS™ ripstop fabric and enhanced insulation, this vest is tough enough for the jobsite while remaining comfortable enough to wear all day—whether as a standalone layer or under a jacket.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: M300B-21S
• Brand / Series: Milwaukee M12™ AXIS™
• Product Type: Heated Vest Kit (Small)
• Heating Technology: HEXON HEAT TECHNOLOGY™ for faster heat-up and longer heat retention
• Heat Zones: 2 zones — Chest and Back
• Heat Settings: High, Medium, Low per zone
• Runtime: Up to 8 hours (low), 4 hours (medium), 2 hours (high)
• Material: AXIS™ ripstop polyester fabric for durability and tear resistance
• Insulation: 2X more insulation for improved warmth
• Weather Resistance: Wind and water resistant with DWR finish
• Fit & Comfort: Lightweight, compressible design for layering or standalone wear
• Battery Placement: Zippered pass-thru pocket allows front or back positioning
• Pockets: 4 total pockets (2 hand, 1 interior, 1 battery pocket)
• Adjustability: Adjustable waist drawcord to retain heat
• Care: Washer and dryer safe
• Compatibility: Works with all M12™ batteries and Heated Gear Power Source w/ App Control

Ideal For

• Cold-weather work where mobility matters more than bulk
• Wearing as a mid-layer under jackets or outerwear
• Jobs needing quick heat-up and consistent core warmth
• Users who want durable, lightweight heated gear for all-day use
• Anyone who wants to stay warm without feeling like they’re wearing a sleeping bag with sleeves missing