Columbia now uses heat-reflective lining material in many of its winter garments. This material, named Omni-Heat Infinity, adds almost no weight to the clothing but significantly improves thermal properties. With bib-style pants, you dont have to worry about keeping them up, and your lower back is protected from the cold wind when adjusting your ski boots. - Regular fit - Omni-Tech fabric: waterproof, breathable, with taped critical seams - Technical insulation - Adjustable waist adapts to different thicknesses of base and mid-layers - Zippered front pockets and chest pocket - Snow gaiters at the leg openings - Reinforced leg openings - Ventilation zippers - Belt loops The product does not contain PFAS compounds.