Layer up against the deep cold with the FREDD MARSHALL Smart USB Heated Base Layer. Thirty heating zones spread warmth across the torso, back and legs, all powered by any standard 5V USB power bank. A brushed, fleece-lined cotton-rich knit traps body heat for soft, next-to-skin comfort, making this unisex set ideal as a thermal under-layer or worn on its own indoors. Adjustable heat levels keep you comfortable whether you are commuting, working or relaxing in sub-zero conditions.

Specifications

Construction & Features

• 30 heating zones deliver full-body warmth across torso and legs.
• Powered by any standard 5V USB power bank for cordless heat.
• Brushed fleece lining traps body heat for soft warmth.
• Cotton-rich knit feels comfortable against the skin.
• Slim base-layer cut wears easily under everyday clothing.
• Adjustable heat settings for personalized comfort.

Intended Activities

Winter Commuting — Discreet full-body warmth under work or casual clothing.

Outdoor Work — Reliable heat for long shifts in the cold.

Camping & Travel — Stay warm in unheated cabins, tents and transit.

Home Comfort — Cozy warmth indoors when you would rather not crank the heat.

Fit & Sizing

Athletic, close-to-body fit designed to layer under clothing. Please consult the size chart before ordering; size up if you prefer a roomier feel.

Frequently Asked Questions