Large Merlin sleepsuit. This was a miracle sleep suit with our baby. Great used with no stains The Baby Merlin's Magic Sleepsuit is the original swaddle transition product, created by a Pediatric PT and mom of 4. Merlin's Magic Sleepsuit helps establish good sleep habits and provides parents peace of mind that their baby is getting adequate rest for proper growth and development. The Baby Merlin's Microfleece Magic Sleepsuit has a soft and breathable jersey cotton inner layer, a soft microfleece outer layer and a layer of polyfil in between for just enough comfort.