Have an absolutely "fin"-tastic time when you wear this Mermaid Costume Onesie by Silver Lilly! Crafted from ultra-soft 100% polyester, this cozy bodysuit will be a hit at any Halloween party, festival, or pajama sleepover. Intricate detailing on the head and body bring this magical creature to life, complete with shell bra, scaled “fin", and decorative flower on hood. The slim cut is comfortable and won't restrict your movements, giving you the freedom to sleep, dance or play as you please. For best results hand wash, lay flat to dry, and iron on low heat if needed.