- Fabric 30/1. Side seam and 1 side vents. Rib knit contoured collar and hemmed sleeves. Three tone-on-tone buttons (some colours have a contrast colour placket). Woven label. Care label. Oeko-Tex Standard 100 Certified.Washing Instructions Machine wash warm. Inside out, with like colours. Only non-chlorine bleach. Tumble dry medium. Do not iron if decorated. Do not dry clean - - Fabric 30/1. Side seam and 1 side vents. Rib knit contoured collar and hemmed sleeves. Three tone-on-tone buttons (some colours have a contrast colour placket). Woven label. Care label. Oeko-Tex Standard 100 Certified.Washing Instructions Machine wash warm. Inside out, with like colours. Only non-chlorine bleach. Tumble dry medium. Do not iron if decorated. Do not dry clean