PETIT BATEAU BABY BOY' SHORT-SLEEVED COTTON BODYSUITS - 3-PACK SIZES 3-36 MONTHS PACK OF 3 SHORT-SLEEVED UNISEX BODYSUITS IN PETIT BATEAU'S ICONIC RIB KNIT. When your baby gets a bit bigger, envelope necks replace wrapover bodysuits. The wide opening makes it easy to pop on over your baby's head without any squeezing! Super practical because of the envelope neck and poppers between the legs.