- Fabric information - ISOFLEX 100% polyester . Antibacterial finish. Good wicking performance. Quick-drying. Special features - Elasticated and drawcord waist. Contrast colour side panels.Washing Instructions Machine washable. Do not bleach. Tumble dry on low setting. Cool iron. Do not dry clean. Wash dark colours separately. Close all fasteners before washing and drying. Do not store whilst damp. - - Fabric information - ISOFLEX 100% polyester . Antibacterial finish. Good wicking performance. Quick-drying. Special features - Elasticated and drawcord waist. Contrast colour side panels.Washing Instructions Machine washable. Do not bleach. Tumble dry on low setting. Cool iron. Do not dry clean. Wash dark colours separately. Close all fasteners before washing and drying. Do not store whilst damp.