X Bionic are the manufacturers of compression base layers, pants, shorts, and t-shirts. Whether you're skiing, climbing, running or cycling, your body is working hard to regulate itself to a constant 98.6° F. That's when award-winning X-Bionic® Functional Sportswear comes in. Delivering high performing, fully functional workout apparel is what they do best. As leaders within the industry, X-Bionic® Functional Sportswear was developed by leading European textile scientists who have engineered proprietary fibres’ and fabric constructions to cool you when you're sweating and keep you warm when it's cold.