The cassock alb or cassalb is a relatively modern garment and is a combination of the traditional cassock and alb. It developed as a convenient undergarment worn by clergy and as an alternative to the alb for deacons and acolytes.
A white or off-white cassock-alb has replaced the traditional cassock and alb in some Anglican churches since the 1970s. On rules concerning its use, see The Church Times. This garment is not the same as the chasuble-alb, which is approved for use in the Roman Catholic Church in certain circumstances.