hi i am 20 and had to wear all white for my confirmation at 16.our parrish is strict and has requirements for first holy communion and confirmation.for first holy communion the girls have to wear the communion dress,veil,gloves,tights and shoes.to symbolize our purity of baptism we have to wear a cloth diaper and plastic pants under the tights.for confirmation we had to wear a floor length white dress,veil,gloves,shoes and tights with the diaper and plastic pants under them.our parrish highly stresses purity and innocence so they require the infant type underwear for the girls.