For those looking for a more eco-friendly way to update their skiwear, Erin Snow is a great place to start. These 'Peri' leggings are made from a recycled nylon-blend, designed specifically to level body temperature, and have a flattering high-rise waistband that will stay put whether you're enjoying a relaxing green run or something more challenging. They're especially hard-working in tough conditions and can be layered beneath pants for extra protection and warmth.