Enjoy the cooling technology built into the Under Armour Women's Iso Chill Dayz Hoody, while the Hydro Armour treatment protects you from the elements. It's a great pick when you need light coverage on the water. 3.68 oz. 100% nylon fabric. Heathered Iso Chill Cooling Technology features yarns with increased surface area that help dissipate heat from the body, creating a cooling effect. Hydro Armour water fighting technology is quick drying, and chlorine and salt resistant. UPF 30 sun protection. ArmourBlock neutralizes odor causing microbe to keep your gear smelling fresher longer. Fitted cut is contoured to the body, without the constriction of compression. Import.