•Recycled and recyclable polyester R1 fabric provides excellent stretch, warmth, wicking and breathability in a variety of temperatures, whether worn as lightweight insulation or a thermal baselayer •Lightweight yarns wick moisture •Outer microfiber yarns speed evaporation •Interior grid enhances compressibility and airflow •Jersey microfiber face for low-friction, non-binding layering •Zippered, brushed-polyester mesh chest pocket •R1: 6.5-oz Polartec® Power Dry® (93% polyester that's 60% recycled/7% spandex). Recyclable through the Common Threads Recycling Program