Flylow Firebird Bib - Men's: The Firebird Bibs are the working man’s three-layer bib and were created with toughness in mind. The 10k/10k fabric is waterproof enough to handle the nastiest storms and breathable enough for a tour. They’ve got durable Cordura reinforcements where you need them, and a breathable softshell panel on the back makes these the perfect tool.