Halloween costumes don't have to be complicated! If you feel like you just want to be cozy this spooky season, these are the costumes for you!

Stay snug in festive onesies that'll keep you warm while still fitting the bill for all your Halloween events. These low-effort costumes are perfect for people who want to keep it low key -- or wait to order until the last minute!

And thanks to Amazon, they're guaranteed to get to you quick whenever you find your 'fit!

For fans of Winnie the Pooh, you'll look adorable this Halloween in a cozy Tigger onesie. You'll be transported to the Hundred Acre Wood while wearing this super comfy zip-up jumpsuit which features Tigger's signature striped orange fur.

And when Halloween's over, you'll still have this incredibly soft onesie to wear to bed or while lounging around the house!

"I bought this for my daughter as a Halloween costume, but I like the fact that she will wear it for pajamas, as well. It fits as expected, it's warm and comfy. Super cute!" one five-star reviewer wrote.

We scare because we care! Get scary this Halloween season in your very own Monsters, Inc. Sully onesie.

Truly embody Sully in this oversized onesie that features his purple spotted fur, long tail and horns. You'll be feeling right at home with all the other scarers in Monstropolis in no time!

And if you're hoping to dress up with a pal, they can join in on the fun in a Mike Wazowski onesie, also available on Amazon.

Aloha! You'll be feeling "cute and fluffy" in a comfy Stitch onesie on Halloween night!

Stay cozy while wearing this blue hooded jumpsuit which is made from super soft fabric that's both lightweight and breathable. And if it ends up getting a little dirty while out trick-or-treating, it's easy to clean as it's machine washable.

One happy customer wrote that they bought the Halloween costume for their son but he loves it so much, he now "uses it almost every night."

🎵 Spooky, scary skeletons send shivers down your spine! 🎵 Get dressed up for Halloween in this classic skeleton onesie. You'll be comfortable all night, whether you're trick-or-treating with friends and family or hitting up a festive party.

Take things to the next level by finishing off the look with some ghoulish face paint!

One customer wrote: "Fits loosely so it's not too snug, love the pockets, and it's extremely soft. Warm material and great quality on the design. Would absolutely buy again!"

Feeling spicy? Hit up all your Halloween haunts wearing this Tipsy Elves Sriracha onesie!

You're sure to be cozy in this saucy red jumpsuit that features the iconic Sriracha rooster and green pointed cap. Available in a variety of sizes, ranging from extra small to 3 XL, it's sure to be a comfortable fit for everyone.

"Amazing costume! Everyone loves it, it's comfortable, well made, zipper is awesome. Big fan!" one customer wrote in their review.

Get all wrapped up this Halloween in a Tipsy Elves mummy onesie!

This easy costume will have your friends thinking that you put in a ton of effort -- but no one will know that everything came together in one piece! This durable jumpsuit has fabric pieces draped all around and hanging tassels that gives the vibe that you’ve been decomposing for centuries!

Now all you need is to find your Cleopatra!

You'll be howling at the full moon in this Tipsy Elves werewolf costume!

Make the transition from man to wolf in this fuzzy onesie that's sure to keep you warm all night. This jumpsuit not only features realistic fur but also a layer of tattered clothing creating the appearance that you're in the middle of your shape-shift. Pull the hood up to show your ears and complete the whole look.

"Got many compliments during a chilly Halloween evening!! Super cute. It was perfect for me," one five-star reviewer wrote.

Mooove over and cue the DJ to play "Mooo!" by Doja Cat because you ARE a cow!

This Tipsy Elves cow costume is udderly hilarious and will definitely be the hit of any Halloween party. Step into this cow-print one-piece which includes udder-shaped pockets that double as gloves. It also comes with an attached hood which features a snout, ears and horns.

"Best cow costume," one customer wrote. "The glove utters make it perfect for some colder weather trick or treating or even a bar crawl!! Love this product! Best onesie on the market!!"

It's a me, Mario! Get dressed up as the most popular plumber in Mushroom Kingdom in this Super Mario Bros. onesie!

This officially licensed zip-up jumpsuit comes complete with Mario's blue overalls, red shirt and a hood that doubles as his signature hat. It even includes a detachable mustache to help you truly get into character.

Now all you need is to master Mario's Italian accent and find someone to be your Princess Peach!

Are you ready kids? Aye, aye Captain! This Patrick Star onesie is perfect for any SpongeBob SquarePants fan who wants to be cozy on Halloween.

This hilarious and comfortable jumpsuit will bring SpongeBob's lovable sidekick to life -- signature green and purple shorts included. Simply zip up this onesie, cover your hands with the attached gloves and then pull up the stuffed hood to get the full effect of Patrick's star shape!

One happy customer wrote: "So much better quality than we expected. Great product. Worn for Halloween. Perfect!"

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