I finally splurged and bought a pair of CW-X tights, and I can not believe what a difference they've made for skiing. Typically after a long day I'm sore in my lower back, but the phenomenal support given by the tights made a hard day at Alta seem like a breeze. The support given to the knees improves flex and stance as well. I highly recommend these for every skier. If you're wanting to save layers, get the insulated version of the tights.