waterproof bib pants with a high percentage of recycled nylon. the north face freedom bib pants feature a chimney ventingâ„¢ system for a perfect climate. the waterproof, breathable and seam-sealed dryventâ„¢ 2l fabric keeps you dry, while ventilation holes on the inner thighs provide a cool breeze.features like stretchventâ„¢ elasticated gaiters, a velcro chest pocket, pre-shaped knees and reinforced cuffs make every day on the mountain even better.these pants are made from 57% recycled nylon.