Create DIY for this, I guessing you are going to need to use 2 shirts, cut the one you'll wear with the side slits. Then cut strips out of Tshirt, sew into the inside of the first shirt at the top then weave and sew to the bottom of shirt.
Between the pillow fights, snacking and giggling, sleepovers can get pretty wild. Luckily we have sleeping bags that are just as wild. They feature easy-to-match color schemes and charming animal faces you can use as pillows.