Midweight nylon is actually the sweet spot for most skiers and snowboarders. The "denier" (D) rating measures fabric thickness—200D to 400D is tough enough to handle regular contact with ski edges and typical backcountry wear, without adding unnecessary weight to your pack. It's the best balance for most riders.
This material is ideal if you do a mix of resort laps and day tours, or head out on backcountry trips a few times a week. It typically comes with a DWR (durable water repellent) coating that sheds snow and moisture just fine for normal use.
You'd only need to step up to heavy-duty 400D+ nylon if you're a guide, out almost every day, or regularly scraping your pack against rocks. Going lighter saves weight but risks punctures from sharp edges—midweight hits the right balance for most people.