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Adult Onesie Pajamas Halloween Costume One-Piece Slim Fit Sleepwear Cosplay Suit for Mens Womens

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Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Apr 28
Order within 2 hours and 11 minutes
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Size: Small


Color: Seahorse


Description

Adult Onesie Pajamas Halloween Costume One-Piece Slim Fit Sleepwear Cosplay Suit for Mens Womens

Package Dimensions ‏ : ‎ 12 x 10 x 3 inches


Department ‏ : ‎ unisex-adult


Date First Available ‏ : ‎ June 19, 2025


Best Sellers Rank: #77,695 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #10 in Men's Novelty One-Piece Pajamas


#10 in Men's Novelty One-Piece Pajamas:


Customer Reviews: 4.5 4.5 out of 5 stars (163)


Color: Seahorse


Pattern: Cartoon


Seasons: All


Fit Type: Snug


Subject Character: Seahorse


Sleeve Type: Long Sleeve


Neck Style: Round Neck


Product Style: Onesie


Brand Name: WEQJC


Age Range Description: Adult


Special Size: Standard


Number of Pieces: 1


Item Length Description: Ankle Length


Unit Count: 1 Count


Model Name: Onesie


Number of Items: 1


UPC: 726899236626


Size: Small


Garment Size Country: United States


Apparel Closure Type: Zipper


Specific Uses For Product: Sleeping


Sleeve Length Description: Long Sleeve


Fit to Size Sentiment: positive


Material Type: Polyester


Fabric Type: 100% Polyester


Product Care Instructions: Machine Wash


Apparel Fabric Stretch: No Stretch


Apparel Fabric Weight Class: Lightweight


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Apr 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Fun and comfortable Hedgehog onesie!
Size: Large Color: Hedgehog
I am 5'9" and 200 lbs, and the Large fits me very well overall. I did find it to be a little tight in the shoulders, but that is to be expected with a unisex cut. The fabric is a standout feature, with a textured, scaly look rather than a flat print. It's very soft and feels great to wear around the house. The details in the hood are really well done and give an awesome 3D hedgehog effect. The light-colored chest panel provides a nice contrast that makes the design pop. Plus, the elastic cuffs at the wrists and ankles are high quality and help keep the onesie in place while you walk. ... show more
Reviewed in the United States on December 30, 2025 by noclips

  • Great Product
Size: Small Color: Pink Pig
This is cute. It worked great for my daughters Halloween costume, and it is still holding up and I'm writing this in February. It has been washed multiple times and it's not peeling or shrinking or loosing color. It's holding up great! My daughter uses it for her pajamas. It is really cute and a great price considering we've got a lot of use out of it. My daughter loves it because it is warm and cozy. ... show more
Reviewed in the United States on February 16, 2026 by epqueen

  • Fun Halloween Costume
Size: X-Large Color: Dinosaur
This onesie is very comfortable. It fits well and isn't difficult to clean or maintain. The fabric used for the fur is a bit annoying, as it catches and sticks onto clothing easily, almost like it is shedding in a way. The pockets are very convenient, but they are not very deep and can't hold too much. All in all, it is a comfortable onesie that's perfect for a quick Halloween costume. I do think it's better work with some underclothes. ... show more
Reviewed in the United States on November 6, 2025 by Anna McConkie

  • Great quality! Love it!
Size: Small Color: Frog
These are so soft and comfortable! Fit a little small, but not too bad. Maybe I was expecting a looser fit than I have. I wear a small and ordered a small and now I am a shapely little frog. Nice quality fabric that washes well, and should last a long time!
Reviewed in the United States on April 22, 2026 by Tiffany

  • SO COMFORTABLE AND FUN
My daughter absolutely loves this! It's soft, comfortable and warm! It's so fun for her to wear. She takes it every time she has a sleepover with friends.
Reviewed in the United States on April 16, 2026 by Ami Cotton

  • Soft and warm!
Size: Large Color: Grey Koala
This was a fun last minute purchase for a Halloween costume. It was delivered quickly. It fit well and according to the size chart. It is very soft and comfy! I also wore this during the recent snow storm and it kept me nice and warm. I am glad I purchased this.
Reviewed in the United States on January 30, 2026 by Haley L

  • Love it
Size: Medium Color: Seahorse
My granddaughter loves it The material is really solved. She loves the colors and how it fits on her. And how it keeps her warm.
Reviewed in the United States on March 15, 2026 by kelly turbyfill

  • Baggy
Size: Large Color: Santa Claus
Great quality, soft and very warm! Ordered large, usually wear 8-10, it was huge. I should have ordered a medium, but used it anyway.
Reviewed in the United States on January 11, 2026 by Elaine

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