The Men's Substratum II Core Stretch. This men's midlayer is crafted from our iLUS Core Stretch fabric, which offers 4-way stretch for superior freedom of movement. The zip-up hiking top features a brushed-back finish for enhanced warmth and comfort. It also includes antibacterial odour control and quick-drying fabric to keep you fresh on the trail, along with UV50+ protection. The garment is made from recycled, warm-backed stretch fabric with textured panels and boasts Ilus Core Natural anti-bacterial odour control properties, making it quick drying. It has a full-length zip and a high neck for a close, comfortable fit.