You dont compromise when it comes to hard work. Neither do these pants. Get ultimate comfort and performance all in one durable garment in cold temps down to -40°F. With Performance-Flex on the knees for greater mobility and a built-in belt for the perfect fit, you can be flexible on the job. Pair with a PolarForce sweatshirt and get it done quickly, safely and right. Dig a ditch. Manage inventory. Unload a shipment. Mend the fence. Whatever items your cold weather work to-do list has, you can check them off with the PolarForce Collection. Sizing Instructions: For the most accurate fit, take your measurements over the base layer of clothing you intend to wear with this RefrigiWear gear (such as thermal underwear, jeans or a sweatshirt) and refer to the size chart for this product.