The Arc'teryx Women's Lana SS Top is a lightweight shirt for gathering miles of trail experience. Constructed with Nucliex; fabric, a nylon core spun merino, you get the durability of nylon blended with the natural capabilities of Merino wool. Merino is not only soft against the skin, but wicks moisture, breathes and is naturally odor resistant. Ideal fabric for hot summer treks. Features of the Arcteryx Women's Lana Short Sleeve Top Merino wool with a nylon core provides durable, long-wearing comfort, odour resistance and thermal management Gusseted underarms for mobility and freedom Merrow stitch seam construction reduces seam size Lightweight merino knit with enhanced durability Each yarn is constructed with a Nylon core which is then completely wrapped in Merino wool fibres Nucliex fabric provides great Merino Wool comfort and versatility, reinforced against daily wear and tear