It is no small thing that Jesus washed the disciples' feet, as recounted in John 13:8. There are some who compare the washing of the feet to the washing we sinners receive in baptism, though Jesus mentioning that the disciples were "already clean" makes others question the accuracy of such a connection.
The indisputable other meaning to be found here, though, is how much God is humbling Himself to take on our sins, even to death on a cross.
Our "Washing" shirt uses Albrecht Durer's woodcut depicting the event along with the passage from John and a simple comment, originating from Mark 10:45, explaining God's purpose here in Christ Jesus.
The shirt itself is a 50% cotton / 50% polyester blend with great durability and minimal shrinking.