The Mountain Hardwear Women's Lightweight Power Stretch Boot Length Tight is a midweight knicker length tight that is a perfect fit for skiiers or riders who don't want their baselyer creeping into their boots. The new lightweight Polartec Power Stretch fabric is extremely stretchy, breathable, and still has a great warmth to weight ratio. The flatlock seams will keep you comfy and the brushed elastic waist will allow you to wear a pack without painful rubbing.