Simms&'; Lightweight Baselayer Top is the essential next-to-skin layer for building a rock-solid foundation that prioritizes all-day mobility, warmth and wicking. Jersey knit brushed polyester combined with sustainable odor control and speed dry moisture management for maximum next to skin comfort Raglan sleeves for optimal fit and movement Flatlock seam construction for next to skin comfort FABRIC TECH: Body - 192 gsm 92% spun polyester, 8% spandex finished with HeiQ Fresh odor control + HeiQ Speed Dry