Full dress headwear varied (both from regiment to regiment, and over time as influenced by military fashion): bearskins were worn by the Foot Guards, the 2nd Dragoons (Royal Scots Greys) and (in a different form) by Fusiliers. Plumed helmets were worn by the Dragoons (except 2nd), Dragoon Guards and the Household Cavalry. Hussars wore their distinctive busby, which also came to be adopted by the Royal Artillery, the Royal Engineers and certain other Corps; it was also worn in a different form by Rifle regiments. The Lancers had their chapka. Infantry of the line often wore shakos (later supplanted by the 'home service helmet'), as did others; though Scots and Irish regiments tended to have their own distinctive full-dress headwear. General officers and staff officers usually wore plumed cocked hats in full dress, as did regimental staff officers and those of some support services. In hotter climates, for all of the above, a white pith helmet was often substituted.