To make the Therminal™ Engineered Leg Warmers, we used a special cylindrical knitting machine that allows us to engineer areas of stretch, compression, and articulation while creating a seamless design. Lighter weight than our standard Therminal Warmer collection, this seamless version is perfect to stash in a jersey pocket when you need a little extra protection on a fast descent or for a long climb in the shadows. We use a yarn that offers good loft for trapping body heat and adding a good sense of durability, while a knit construction allows for excellent air permeability and breathability. This technique and design also comes with the added benefit of aligning with your knee, so the warmers will stay put with just the right amount of compression at the cuffs.