When the summit is being pummeled by biting winds the M's Tremor Pants™ provide maximum protection. The breathable WindStopper® Soft Shell fabric is fully seam taped and water-resistant for weather defense and lined with a combination of tricot and fleece for maximum warmth. Thigh-length side zips offer ventilation when your energy output ramps up. Avg. weight: 24.3 oz./687 g (size L)