Stephanie, our engineer, has developed this women's jacket for running in cool or hot weather. A lightweight, breathable jacket for running in cool or mild weather. Stretchy fabric with excellent freedom of movement protects you from the sun when you run! Stephanie, our engineer, has developed this women's jacket for running in cool or hot weather. MOISTURE MANAGEMENTThis jacket is designed to stay dry while you run. The fabric used absorbs and wicks away perspiration during exercise, keeping you dry. SUN PROTECTION / WHAT DOES UPF50+ MEAN The UPF indicates the degree of protection against the sun (Ultra Violet Protection Factor). It is a standard recognised worldwide.It indicates the level of protection offered by the fabric, specifically the amount of UV absorbed.To meet the standard, the fabric must prevent at least 95% of UV rays from being absorbed. UPF 50+ means that the fabric prevents the absorption of at least 95% of UVA and 98% of UVB. A lightweight breathable jacket for running in cool or mild weather. Stretchy fabric with excellent freedom of movement protects you from the sun when you run! Moisture management The fabric optimises the absorption and wicking of perspiration. Sun protection The fabric protects you from the effects of the sun (UPF 50+) Freedom of movement The stretch material moves with you as you run. Stephanie our engineer has developed this women's jacket for running in cool or hot weather. Moisture management The fabric optimises the absorption and wicking of perspiration. Sun protection The fabric protects you from the effects of the sun (UPF 50+) Freedom of movement The stretch material moves with you as you run.