There is disclosed herein a device for improving flow of air through the nasal cavity of wearer of the device, the device comprising a substantially U-shaped body forming a bridge for spanning the nostrils of a wearer when the device is in use and a first body and a second body interconnected with opposite upright portions of the U-shaped body, each comprising a rib which extends outwardly from a portion of the U-shaped body distal to the bridge and ends in a section provided with padding which forms a relatively large surface area portion, wherein the first and second bodies are adjustable such that each relatively large surface area portion can be urged against a nostril wall, whereby resistance to flow of air is substantially reduced.
