Columbia GLACIAL IV 1/2 ZIP The Columbia GLACIAL IV 1/2 ZIP lightweight women’s sweatshirt is a must have piece for an active lifestyle. Made from ultralight micro fleece, it is designed for regular wear or aerobic sports. The half-length zipper and the slim fit make it a practical first layer. Thanks to the original print, you will want to wear it as an outer layer too. Columbia GLACIAL IV 1\/2 ZIP