Tie Dyed Shop Rainbow Spiral Tie Dye Boxers 100% heavy weight cotton, pre-shrunk, and run quite small. We HIGHLY recommend that you order 1 size large. Will last a long time with cold water washings. We use pdf (cotton) stitching which absorbs the dye also. Some dyers use cheaper lightweight blanks with nylon stitching which does not absorb the dye. This item is frequently purchased for personal use and as a gift.