The Men's Fuse Sweater. Made from recycled polyester/elastane 4-way stretch Ilus Core fabric for ultimate comfort in motion. Supremely soft and quick-drying keeps you warm and dry all day. Half-zip fastening with inner zip guard to get air when you need it. The Dare 2b Fuse Sweater. Made from 4-way stretch fabric for ultimate comfort. Quick-drying keeps you warm and dry all day. Half-zip fastening with inner zip guard to get air when you need it. Layer it up for everything outdoors.