Because of the ornate nature of the soldier's redcoat, he was issued an off-duty coat for all his other tasks. He would wear the white barrack's coat for drill, fatigue duties and his few minutes of free time. When the new, single-breasted style of coat was issued, the men no longer had use for their waistcoats. Sleeves were added, therefore, and this is where the barack's coat comes from. The coat could also be worn as an added layer of warmth in the winter. This coat would be carried in the soldier's trotter pack.