The Under Armour Womens Iso-Chill Fusion Tank Top II is a versatile performance piece that works with street clothes and athletic wear. Accented with UA logos, this sleeveless top features a V back, a gently curved hem, and Iso-Chill cooling technology that dissipates heat and creates a cooling effect at the gym or on the trail. The Under Armour Womens Iso-Chill Fusion Tank Top II is made of 100% nylon. Imported. Sizes: XS-XL. Colors: Black/Tetra Gray, Fuse Teal/Azure Teal. Type: Sleeveless Shirts.