The RAF uniform was designed in 1920: capacious pockets, belted, long, deep vents, well-proportioned: it made everyone look tall. The service dress, above, remained unchanged until the 1960s. All the Commonwealth air forces: the RCAF, RAAF, RNZAF, RSAAF had the same uniforms, nice smooth dark grey-blue worsted, unlike the scratchy army, evidently. The caps were quite amazing: they unfold to make a balaclava of sorts.
The RCAF tartan was invented in 1942, supposedly on PEI, probably at the Summerside base. The CO of the base, nameless in the DND account, designed the tartan using red, blue and black pencils. I like this very much: ordinary pencils were black graphite; red and blue leads, often in one pencil, were traditionally used in accounting, so the colours come from just general office equipment. How very modest, to work within the limitations of one's desk.
Although one can buy the above muffler from something called Heritage Brands, the image on the DND website is more how I remember it — more like a pencil drawing: