Arc'teryx Calvus Cap | Lightweight Performance Cap Description Neckline Configuration - DWR finish protects from moisture Pack Pocket Configuration - Polydel Mesh-100% polyester - 80 g/m. A lightweight highly air permeable - gridded knit mesh with wicking properties for moisture management. - Spacermesh - Socora-100% polyester - 105g/m. Light taffeta weave with 2-way mechanical stretch properties and a DWR (durable water protection) finish to resist moisture. Pack Suspension - Trail Running - Breathable Material Materials - Do Not Bleach - Do Not Dry Clean - Do Not Iron - Do Not Tumble Dry - Do Not Wash - Surface Clean Only