Westcomb built the Women's Vapor FX Ski pant from 820NT eVent fabric, which is completely waterproof, windproof, and highly breathable.-Generous cut with adjustable waist gives you total freedom of movement and a custom fit Articulated knees and a roomy fit provide a comfortable, unrestricted feel-Fully micro-taped seams for a moisture-impenetrable outer layer Seams constructed with 20 SPI (stitches per inch), which exceeds industry standards; a higher SPI creates a lighter, more durable seam that doesn’t require topstitching-The adjustable contoured waist with padded lumbar support keeps snow out of your crack and helps support your lower back-Inseam zips help prevent overheating during sunny, late-season runs and long boot-packs up steep chutes-Zippered thigh pockets for ample storage room-Reinforced instep patches stand up to sharp ski edges