Whether we need an incredibly warm baselayer underneath our ski bibs or extra warmth for the trail, the Mountain Hardwear Compressor Alpine Pant is our go-to. The Pertex Quantum Pro ripstop shell fabric offers lightweight durability and abrasion resistance, while the Primaloft Gold P. U. R. E. insulation provides unmatched warmth and comfort. But what we like most about these pants is the full-length zipper that allows easy entry or exit over our bulky snow boots.