- Fabric information - ISOVENT marl polyester/ elastane mix - Fabric. ISOVENT multi colour polyester/ elastane mix - Fabric. Good wicking performance. Quick-drying. Special features - Loose fit for extra comfort and flexibility.Washing Instructions Cool machine wash with pure soap flakes. 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 - ISOVENT marl polyester/ elastane mix - Fabric. ISOVENT multi colour polyester/ elastane mix - Fabric. Good wicking performance. Quick-drying. Special features - Loose fit for extra comfort and flexibility.Washing Instructions Cool machine wash with pure soap flakes. 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.