Warmth and functionality for these essential ski pants The 2-layer Treva Pants are the essential Picture ski pants. Made with sustainable recycled polyester, they feature a 10K/10K membrane for reliable waterproof breathability, reinforced with a PFC-free durable water repellent treatment. With 40-gram insulation and a waist gaiter, these pants keep you warm while keeping snow out. With a classic yet efficient design, these pants have thigh zips that offer additional ventilation when playing hard in the powder. With a straight fit, our Treva Pants are an excellent warm shell layer whenever you click into your skis.