Its a both thing. If she is more comfy in the softness of the sweats then I can understand. I have RSD in my left knee and starting to go down toward my foot. Really soft clothes feel better also lighter weight clothes feel better when it hurts. I have a pair of sweat pants I have had for a long time and as soft as they are now I feel more comfy wearing them than I do really nice clothes that are stiff and abrasive to the skin. Also the looser the clothes are the less likely they are to rub.