Heat generating fabric that warms up as you wear it without heating gel packs, batteries or wires.

Liners

Newly Redesigned and Improved Twist Ultra Liners with FIBREHEAT™ Self Heating Technology
Newly Redesigned and Improved Twist Ultra Liners with FIBREHEAT™ Self Heating Technology $39.95
Newly Redesigned and Improved Twist Ultra Liners with FIBREHEAT™ Self Heating Technology
Newly Redesigned and Improved Twist Ultra Liners with FIBREHEAT™ Self Heating Technology $39.95