The Royal Irish Rangers (formed in 1968 by the amalgamation of the remaining regiments in the North Irish Brigade, The Royal Inniskilling Fusiliers, The Royal Ulster Rifles and The Royal Irish Fusiliers) were granted the wearing of the caubeen with the Irish Fusiliers' green hackle.
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The Royal Ulster Rifles did not get a band until 1948, so they did not receive their black hackles until 1947.
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In 1938 the Irish Prime Minister's deputy, James Dillon, complained about a tax on imported ladies' hats, remarking that Irish ladies would be forced to wear "Connacht caubeens".