SKU: 13710440993
monsters inc boo onesie adults

monsters inc boo onesie adults Sully and Mike Halloween Onesies – Sandman's Shop

Sale price$19.13 Regular price$21.26
Save 10%

Pay in installments of $5.32 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 28 - Oct 3

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

monsters inc boo onesie adults Sully and Mike Halloween Onesies – Sandman's ShopUnleash your inner monster (in the friendliest way possible) with the Sully and Mike Halloween Onesies! Inspired by Pixars most lovable scare duo from Monsters, Inc., these soft and snuggly kigurumis are equal parts comfortable, hilarious, and oh so perfect for sleep, lounging, or causing a scene at your next costume bash. Designed for relaxed, playful nights in or unforgettable party entrances, these Halloween onesies are the ultimate way to match

Unleash your inner monster (in the friendliest way possible) with the Sully and Mike Halloween Onesies! Inspired by Pixar’s most lovable scare duo from Monsters, Inc., these soft and snuggly kigurumis are equal parts comfortable, hilarious, and oh-so-perfect for sleep, lounging, or causing a scene at your next costume bash.

Designed for relaxed, playful nights in or unforgettable party entrances, these Halloween onesies are the ultimate way to match with your bestie, boo, or fellow monster-in-crime. Choose between Sully’s iconic polka-dotted fuzz or Mike’s single-eyed charm – either way, you're winning Halloween. Bonus: with their zip-up design, getting in and out is a breeze (because nobody wants to wrestle with a costume when there’s candy to eat).

Key Features & Specifications

Material Ultra-soft Plush Fabric
Available Sizes S, M, L, XL, 2XL (Unisex Fit)
Closure Type Full Front Zipper
Designs Available Sully (blue with purple spots), Mike (green with big eyeball)
Best Use Halloween parties, costume events, sleepovers, movie marathons
Style Loose-fit kigurumi onesie

Size Guide

Size Fit Description
S Snug fit for a fun, playful look
M Slightly roomier for added comfort
L Relaxed fit, perfect for lounging
XL Generous fit for ultimate coziness
2XL Extra room for a laid-back experience

What It Helps With

  • Making Halloween actually comfortable
  • Giving you an excuse to wear pajamas in public
  • Transforming into your favorite monster without makeup or effort
  • Keeping you warm through spooky season (and snack-fueled Netflix marathons)

Why You Never Knew You Needed This

Ever tried finding a couples costume that’s cute, comfy, AND won’t require five layers or freezing your tail off? Yeah, us too. These Sully and Mike Halloween Onesies check every box. They're warm. They're weird. They're wildly lovable. And honestly? You'll probably end up wearing them all year long.

Ideal For You If You...

  • Want to win Halloween and stay warm
  • Prefer lounging to latex
  • Are a fan of Monsters, Inc. (or just giant eyeballs)
  • Need a costume that doubles as sleepwear and selfie gold
  • Believe every great friendship has one fuzzy blue giant and one goofy green bean

Care Instructions

Machine wash cold with like colors
Tumble dry low – or hang dry for fluff longevity
No bleach, no ironing – just monster love
Store in closet (or under bed if you’re feeling spooky)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 13710440993

Discover Niche Categories That Outsell monsters inc boo onesie adults

Top-Converting Item to Boost Your Average Order

4.9 ★★★★★
Based on 8 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
T
Verified Purchase
Troy
Alexandria, US
★★★★★ 2
Started coming apart after seeing washing
Look and fit great but they starting coming apart after the second washing Possibly need stronger thread
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2025
R
Verified Purchase
RC Evans
Alexandria, US
★★★★★ 5
These boot slippers are awesome!
Color: Long Black, Size: 10-13
Love 'em! FINALLY found these after lots of searches.... I wanted "boot" type slippers FOR MEN, so in the cooler/colder weather my ankles stay warm, as well as my feet. (It's easy to find them for women, but for some reason pretty difficult to find them for men.) Well, Amazon must have added these recently, because I had checked a number of times this past winter/spring to no avail. At any rate, these are GREAT! I had worn out another somewhat similar pair I had found on Temu a while back, but they were rather floppy and really too large and wide for my feet. After a year or so they had worn out, so I started searching anew, and found these on Amazon. These fit just great and are very well made, having a thick fleece and padded sole inside and a non-slip sole on the outside. Very, very comfortable! Just what I wanted, and kudos again to Amazon!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 15, 2025
L
Verified Purchase
Loren M.
Birmingham, US
★★★★★ 5
Slippers
Color: Long Black, Size: 10-13
Almost to warm...great on cold mornings!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
J
Verified Purchase
Josh D.
Draper, US
★★★★★ 1
Not durable, cheaply made for big guys 6’4 235lbs
Color: Gray Navy, Size: 13-16, Color: Gray Navy, Size: 13-16
Don’t recommend for men. Boys maybe but not men. I wore them twice for about 3 hrs before bed. Went to put in the 3rd time and they ripped. It’s literally a small sheet of Sherpa from the shoe and plastic wrap. I also got the bigger size and they still don’t fit right. I bought these right before my trip upstate during the holidays, because I live in Florida. I paid $20+ for these, hoping they would be good. 1/10 recommend
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 27, 2026
G
Verified Purchase
Guy Mangotree
San Leandro, US
★★★★★ 4
Size 13 (not 13-16)
Color: Gray Navy, Size: 13-16
I have a size 13 foot and these Winter Socks/Slippers just barely cover the length of my foot, so if you are over size 13 these will be too small_ they are well made and insulated_ they look nice, just like the pic, and I can go from my house to the my car in the snow without the bottoms getting wet_ they are cozy without my feet getting hot_ just wish they were a half inch longer on the foot size to be a more perfect size 13_ they feel about 12-1/2
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 10, 2026

recommand products