Norse Projects Jorn Coolmax Half Zip in Black. Made with innovative sweatshirt technology, this sweatshirt is made by knitting Norse Projects\' Coolmax yarn with cotton, to create this versatile piece. The Coolmax yarn is applied to the loopback interior to wick away moisture from the body, perfect for exercise, whilst the cotton allows for comfortability and a clean look. This piece features a reflective logo, a self-fabric collar, a half zip front and a twin needle stitched hem and cuff.