waterproof bib with a new, completely recycled shell. the the north face dragline bib pants have been redesigned to feature a waterproof, windproof and breathable 100 % recycled polyester shell. the generous chest pockets and cargo pockets have been equipped with a waterproof zip, while gadgets like elastic gaiters provide comfort.dryventâ„¢ 3lthe dryventâ„¢ fabric of the dragline bib is fully waterproof, windproof and breathable. the pfc-free dwr coating used allows moisture to bead up and the membrane transports water vapour from the inside to the outside as quickly as possible.