Description This Product Is Final Sale. 275 Gsm – If You'Re Looking For A Baselayer To Stand Up To The Coldest Winter Days Mother Nature Throws Your Way – And We'Ve Had Customers Wear Comet On Expeditions In Antarctica And Alaska – Then You'Ve Come To The Right Place. Duckworth'S Proprietary Comet Fabric Is Natural-Technical Mash-Up, Combining A Pure, 100% Montana-Grown Merino Wool Outer Layer And A Recycled Polyester Inner Layer. Why The Combo Polyester Is Hydrophobic, Meaning It Will Wick Sweat And Moisture Right Off Your Skin And Into The Hydrophilic Wool Layer; Wool Chemically Becomes Even Warmer When Introduced To Water And Water Vapor, Thus Explaining Why The Slim-Fitted Comet Leggings Will Have Your Legs Feeling Dry And Toasty Even In The Nastiest Conditions. Soft To The Touch, Durable, Anti-Odor, Moisture-Wicking, Quick-Drying, And Versatile: Your One-Stop-Shop Baselayer Legging.