Get access to everything we publish when you sign up for Outside+.
3Mâ„¢ Thinsulateâ„¢ Insulation is used in your jacketsâ€š pantsâ€š glovesâ€š hats and boots to help keep you warm when it’s cold outside. The unique microfibers or fine fibers that make up Thinsulate insulation work by trapping air molecules between you and the outside. The more air a material traps in a given spaceâ€š the better it insulates you from the cold outside air. Because the fibers in Thinsulate insulation are finer than the fibers used in most other synthetic or natural insulationâ€š they trap more air in less spaceâ€š which naturally makes Thinsulate insulation a better insulator. So we haven’t repealed the laws of nature with our thin insulation; we’ve simply improved themâ€¦to help keep you warm.