The Trew Gear Trillium Bibs are made with a burly nylon oxford construction and a boost of insulation for extra warmth throughout our cold, damp PNW winters. Engineered just like the Astoria, but with 60 grams of synthetic insulation, these all-mountain, all-weather bibs thrive in lower temps. Their relaxed fit makes for easy layering, and a 20K/20K water and windproof membrane protects from snow and wet weather.