BluBird hoses were designed, developed and manufactured by RMX and are the market's lightest, strongest, most flexible 100% rubber hoses. BluBird is the evolution of general purpose hoses. A conflation of 20 years of market and technical experience and the need to invent, BluBird was developed not with the market-needs in mind, but with the end-user needs. It is quite simply the ultimate rubber hose. 40% lighter than others and as light as hybrid / PVC hoses. And it is stronger than the best of rubber hoses.. Ease of use: Lays flat, does not kink under pressure, doesn't get sticky and dirty like plastic and hybrid hoses, much easier to clean.. Unmatched cold-weather flexibility: Remains as flexible at -50F as the best hybrids do at 0F. Perfectly usable. Doesn't become a noodle up till 200F either.. this hose will last long. Really long.. Braided, not just spiraled, polyester gives 300PSI Working Pressure from -50F to 200F with a burst pressure of 1200PSI (Most '300PSI' hybrids have a 900PSI burst).