The Endura MT500 Freezing Point Womens Pants uses lightweight,windproof shell panels with Primaloft Gold insulation.Endura MT500 Freezing Point Womens Pants HighlightsLightweight, windproof shell panels with PrimaLoft® GOLD insulationPFC-Free, non-toxic durable water repellent finishBuilt in stretch waistband adjustment plus additional belt loops Zipped hand pocketsZipped mesh thigh vent and zipped ankle opening with waterproof gussetClickfast™ liner compatible90 day Satisfaction Guarantee More info