An uncomfortable garment worn as a form of penance
. Made from goat
or horse hair
, it came in two varieties; said shirt or a loin girdle
. The penitent
would wear one underneath his or her clothes and continue normal every-day life
. As normal as one could handle, anyway.
Lancelot was thought to have worn one under his armour to try and get over Guinevere. I guess the itching and scratching was all for nothing.