Lil' Monsters Adult Snapsuit

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Bring the Lil’ Monsters crew along with you! Featuring Draco the Dragon, Puffy the Pink puffball, Unicrest the Three Eyed Dino, Midnight (Blue) & Twinkle (Purple).


This super cute and comfortable Snapsuit is made with cotton/spandex spandex giving it a great stretchy feel while keeping it as soft as cotton. 


Our Snapsuits give a tight, discreet fit while helping smooth lines and holding diapers/pads in place without the fear of shifting or sagging. Features a full snap front and crotch.


Fits similar to a standard female T-shirt sizing (size up one size if you are used to male sizing). This Snapsuit can stretch up to a few inches longer than listed below and can shrink up to 15% after washing.


Size Chart
Size Chest  Length
XS 27" 26"
Small 31" 28"
Medium 32" 31"
Large 36" 32"
XL 42" 33"
2XL 46" 35"
3XL 50" 37"
4XL 54" 39"


Made with 95% cotton and 5% spandex

22 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Capp on 2022 Feb 7th

    Very comfortable. I've ordered the 4X , it is oversized, but this is how I like it for a nighttime onesie

  • 5
    Very cute and extremely comfortable

    Posted by Jaime on 2021 Nov 24th

    Excellent very comfy and love it

  • 5
    Onesie & Jammies review: perfect for me

    Posted by Murky D on 2021 Sep 9th

    I'm writing a joint review for the onesie and the jammies, since I wear them together. These clothes have been a great source of comfort for me over the past two months I've had them. First of all, they're physically comfortable, and they let me sleep well in a room that lays a bit heavy on the AC. They're super soft, and I just like feeling them against my skin. And wearing the jammies under a pair of long pants in the morning is one of the most comfortable feelings my legs have ever felt. I could absolutely use these as an insulating undershirt in the winter. Second of all, they're emotionally comfortable. I like how the jammies fit loosely going around, but still wrap snugly around my feet nicely vertically. I like how the onesie pulls my underpants (and sometimes training pants) up into my groin, it makes me feel very secure and supported. And when I wear big boy pants on top of either, it gives my tummy a tucked-in look that I think is kind of cute. I also love the designs on these clothes. I find myself looking at Draco the Dragon whenever I feel down. There are a few caveats to these clothes, but I can't really count them against my onesie or jammies. I'm a guy, and can easily pee in the toilet just by unbuttoning a few buttons. However, I need to take the jammies half-off in order to poop in the toilet. I suppose this is by design, and I should try to get back in diapers for full convenience: I'm just not in a position to wear diapers right now, so I need to keep my potty training. The onesie sizing is a bit small, so even though I wear large T-shirts and jammies, I wear an extra large onesie, and it works for me. Also, I specifically bought the Li'l Monsters clothes because it was the only set of clothes that didn't have a pink or white background, but now that I see them in person, they're more of an off-white background instead of a blue. Again, I don't count any of these against the clothes themselves. It's just a set of circumstances I'd rather not have. Overall, I've decided over the past couple months that I'm going to add the Rearz onesies and jammies to my permanent wardrobe. They've made me feel so comfortable and given me such support that I always want them with me, regardless if I'm wearing diapers or not. If Rearz ever makes another onesie or jammies that are a darker shade of blue or purple, I'll snatch them up real fast. Maybe they could have more of Draco's dragon friends?

  • 5

    Posted by Eugene on 2021 Aug 4th

    Great fit andlove the pattern

  • 5

    Posted by Eugene on 2021 Aug 4th

    Wonderful, love the pattern

  • 5
    LIL Monsters

    Posted by Heinz Bridges on 2021 Jul 8th

    Perfect. I'm 6ft 250lbs. love size 4X

  • 4
    Great fit

    Posted by Anon on 2021 Jun 26th

    Fit is perfect according to sizing info.

  • 4

    Posted by Troy Liebert on 2021 May 20th


  • 5
    Great diaper matching onesie

    Posted by Blue Davis on 2021 May 17th

    This is a great diaper matching onesie. The size does run one size small as most have commented. Does a wonderful job of keeping diapers in place, smoothing out diaper lines and is extremely comfortable. I use these for nighttime. Helps keep diaper firm against skin to prevent leaks when tossing and turning through the night. I highly recommend getting the onesie that matches your diaper.