Hotronic XLP PFI 50 Heat Socks

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Combined with the Hotronic XLP One Power Set Sock Warmer battery pack (sold separately), the Hotronic XLP PFI 50 heat socks become a complete sock heater system.


  • Performance-fit BootDoc Power Fit Socks feature soft, gradual pressure distribution to enhance comfort and warmth
  • Hotronic heating element starts within the sock's double cuff, which securely holds the Hotronic XLP One Power Set Sock Warmer battery pack (sold separately)
  • Element positions itself along your lower leg, wrapping around the Achilles and under the arches and delivering heat to your toes and balls of feet
  • Simply pull socks on, align upper cuff with BootDoc (BD) logo in front, position the heating element beneath toes and balls of feet, and then connect charged battery pack


View all Hotronic Hand and Foot Warmers

Technical Specs

Best Use


Downhill Skiing



74% nylon/20% elastane/6% merino wool

Sock Height


Sock Cushioning

No Cushioning



Size Chart

U.S. Men's2-34 - 67 - 89 - 1011 - 13
U.S. Women's3-45 - 78 - 910 - 1112 - 14
EU32-2435 - 3839 - 4142 - 4445 - 48

Sizing Notes

For socks, please use shoe size.

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