A device for improving flow of air through a nasal cavity of a wearer during activity such as cycling or running or like exercise substantially minimizing air flow resistance, the device including a substantially U-shaped body forming a bridge for spanning adjacent nasal cavities of a wearer a first adjustable body and a second adjustable body mounted to opposite upright portions of the U-shaped body, the first and second bodies each having: a belt adjustable about an attachment mount on an upright portion of the U-shaped body a rib extending outwardly and arcuately from a portion of the U-shaped body distal to the bridge, the each rib ending in a relatively large surface area portion connected to a portion of the belt, the large surface area portion of the each rib adapted for abutting internal wall surfaces of the nasal cavity of a wearer, and wherein the belt and rib form an open channel defining an air flow pathway within the nasal cavity and whereby in an operating condition the belt or belts is tightened by a wearer to allow insertion, and thereafter loosened so as to urge the large surface area portion of the ribs against nasal cavity walls, whereby resistance to flow of air is substantially reduced, producing improved air flow capacity for sporting activities and the like.Linvention concerne un dispositif pour améliorer un écoulement dair à travers une cavité nasale dun porteur pendant une activité, telle que le cyclisme ou la course à pied ou un exercice similaire, réduisant sensiblement au minimum la résistance à un écoulement dair, le dispositif comprenant un corps sensiblement en forme de U formant un pont pour couvrir des cavités nasales adjacentes dun porteur un premier corps réglable et un second corps réglable montés sur des parties verticales opposées du corps en forme de U, les premier et second corps ayant chacun : une ceinture réglable autour dun montant de fixation sur une partie verticale du corps en forme de U une nervure sétendant vers lext
