Our warmest synthetic baselayer, Capilene 4's stretchy fabric offers great breathability and compressibility Interior grid wicks moisture, trims bulk and confers warmth Smooth jersey face slides easily beneath layers Four-panel construction, pull-on tights Elastic waistband is brushed for next-to-skin softness 5.3-oz Polartec® Power Dry® 92% polyester (54% recycled)/8% spandex with Gladiodor® natural odor control. Recyclable through the Common Threads Recycling Program