Snowmobile bibs and snow pants for sledding, skiing, snowboarding, ice fishing and winter work. A bib covers your lower back and core, so snow has a harder time getting in than with pants alone. Options include insulated bibs for cold days and waterproof, breathable shell bibs you layer under, in men's, women's and youth sizes. Look for a waterproof, breathable membrane, reinforced knees and seat, adjustable shoulder straps and boot gaiters that seal around your boots.