600g insulationMoisture wickingReinforced heel for added durability Tackle every job with warm, comfortable feet in the Extreme Pac Boot Liner. Used with the Extreme Pac Boot, this liner helps to keep your head in the game so you can focus on a job well done, instead of achy feet. Get an extra set of liners to switch out during your shift, to reduce wear and tear, or as a replacement. The entire Extreme Collection, now with head-to-toe protection, was designed for comfort, style, and the ultimate warmth. When the cold warns you to stay at home, take it to the Extreme. 600g Thinsulate™ insulation DRI-BLAZE® lining for superior comfort, warmth and durability Moisture wicking Reinforced heel for added durability Extreme Pac Boot Liner