These 100% cotton onesies are hand dyed to their lovely mustard yellow color. The cactus stamp was drawn and hand carved by Woolly Mammoth Designs and each onesie is hand stamped on both sides with an all-over print. The dye and the ink are heat set and are colorfast. While normal wash and dry with detergent are just fine, they DO suggest washing inside out in cold water to prolong the life of the garment. Due to the hand dyed and printed nature of this, some slight inconsistencies in color and pattern are totally normal.