Our editors carefully select every product we recommend. We may earn a commission from these links. Learn more

Pound for Pound, This Is the Warmest Insulated Jacket in the World

Presented by

First developed in the early 1940s, CLO ratings were created to give a more objective understanding of a garment’s insulation’s warmth, relative to its weight and mass. With this rating system now having existed for eight decades, a wide array of garments have been produced with some seriously impressive CLO values, however, none come close to LifeLabs’ MegaWarm Jacket, which boasts the highest CLO rating on the planet.

Pound for pound, this aptly-named item represents the warmest jacket the world has ever seen, with an unparalleled 9.25 CLO value, which is nearly 40% warmer than garments from other leading brands. This ultra-packable yet insanely warm jacket features a fully-waterproof and completely breathable membrane, as well as ethically sourced, 800-fill power goose down insulation. The use of a patented metalized shell with “boxed baffles” helps to evenly distribute the goose down fill, hugely amplifying the insulation’s effectiveness. This area is further helped along via a lightly-gathered taffeta gasket, a rib-knit baseball collar, and rib-knit storm cuffs that trap warmth inside the jacket, minimizing heat loss. And, on top of the collar and chin-guard being adorned in a soft brushed jersey material, the jacket also sports an adjustable hood (with an adjustable hood brim) that’s been designed to comfortably fit over a beanie or brimmed ball cap. What’s more, the jacket manages to keep its wearer insanely warm without compromising their mobility or range of motion.

Offering unbeatable levels of warmth — and the best CLO rating of all time — the LifeLabs MegaWarm Jacket is available now with pricing set at $399.

Purchase: $399

Photo: LifeLabs