Interestingly, this comfortable and flattering style was actually born out of practical necessity.  In 1815, during the Waterloo Campaign, Lord Raglan received wounds to his right arm and sadly had to undergo amputation. Lord Raglan’s tailor innovatively began to make garments with a sleeve that made dressing much easier for him. The sleeve extends to become part of the shoulder, creating a diagonal seam from the underarm to the collar.  This allowed much easier movement for Lord Raglan. It was following his death that the 'Raglan Sleeve' began to gain popularity for its useful advantages. The flexibility of the design means that it is beneficial in physical activities like skating, as well as looking good when just hanging out. -cabbagesandroses.com