The Burton Jet Ridge 2L Insulated Stretch Pants are snow pants that pair lightweight synthetic insulation with a waterproof two-layer shell, so cold lift rides stay comfortable without added weight. Recycled polyester fabric stretches with each movement. What Our Gearhead(R) Experts Are Saying:"I open the mesh-lined thigh vents as soon as I start working hard, and the heat clears out without a snag on anything. I close them before the next lift ride. With them shut, the insulation is enough for the ride up."