Keepin' the ol' legs warm is one of the keys to a long, comfortable day on hill. This pair of leggings from Mons Royale is constructed from Merino 200, Mons' warmest material, so warmth is a guarantee. Merino fabric combined with the slim fit makes these about as good as it gets when it comes to a lower base layer. Merino next to skin works great for any physical activity and will respond well if you begin to sweat. It's naturally anti-microbial meaning you won't stink even when you are working hard. Complete the kit with the Mons Royale Cascade Merino Flex 200 Base Layer.