In the ancient Roman culture, when slaves went about their work, they would tie a long white apron (called egkomboma) on over their other garments. Why is that significant? The word egkomboma is not found in the Greek New Testament, but the verb form (egkomboomai) is used one time–in 1 Peter 5:5. “Clothe yourselves (egkomboomai) with humility.” 
Literally, “tie on the apron of a slave.” Why would Peter use that word to emphasize humility?
Do you suppose that Peter may have been thinking about what Jesus did in the upper room on the night He was betrayed, when Jesus “took a towel and girded Himself…and began to wash the disciples’ feet” (John 13:4-5)? Jesus did the task of a slave. Jesus did the task that no one else in the room was willing to do. Jesus clothed Himself (like tying an apron) with humility!
The command in 1 Peter 5:5 is to us — “Tie on the long white apron of a slave with humility toward one another!” Does this describe you? Do you look like Jesus? Does it fit?