At Prois, performance fabric choices are EVERYTHING. We believe the cornerstone to the best outdoor gear lies in its fabrics. Merino wool is far superior to the synthetic fabrics available on the market and we have sourced the highest quality merino available. Merino wool is naturally anti-microbial, odor-resistant, moisture-wicking, offers UV protection, is naturally static resistant, and the fibers are much finer than traditional wool. Our Olann 1/2 Zip Shirt is constructed of 96% Merino Wool and 4% Lycra. Our Olann Merino 1/2 Zip features an athletic fit, 1/2 zipper for added ventilation, articulated elbows, thumbholes, and form flattering cut. This shirt is constructed long through the torso for tucking in and has a lovely modern fit. We added a touch of Lycra to give this line additional stretch for the perfect fit allowing the garment the move with you without hindering full range of motion. This also allows this shirt to conform to a wide variety of body types.