Parfait Plus size longline bras are bras that have bands that extend to the waist or lower . This longer band helps create a smooth, slim line from the bottoms of the cups and down through the waist. The extra amount of support around the extended band helps keeps the bra cups up and in place, taking strain off the shoulder straps and the back. Longline bras can also relieve back pain and discomfort when standing for long periods of time, while also helping improve posture.