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undies that your kid will actually want to wear
website logo for WunderUndies, a children's underwear company.

Boxers 3 Pack


WunderUndies boxer briefs are children’s underwear that are sensory friendly! They’re made of organic cotton and super soft, environmentally friendly bamboo fabric. These undies are elastic-free and instead have fabric waistbands. But don’t worry that doesn’t mean they’ll fall down! They will be snug on your child’s waist in the perfect way.

Once your kiddo tries them, they won’t want anything else! And neither will you.

This is for a 3 pack of WunderUndies boxers. They are available in sizes 2T – 12 making them the perfect underwear for toddlers, kids, tweens, boys, girls, and gender non-conforming children.

WunderUndies boxer briefs run a little small in sizes 2T-8. If your child measures perfectly into a size, SIZE UP ONE. If they are between sizes, SIZE UP TWO. If your child measures into size 8, getting a size 10 will work.

STEP ONE: Choose your size.

STEP TWO: Pick THREE designs. Make sure exactly three are highlighted or you won’t be able to add to cart.

STEP THREE: Add to cart.

Please choose 3 Designs before adding it to cart.
Total price: $ 0.00


Live up to their name

My girls (7 and 9) both adore these briefs and complain to me if we don’t have any wunderundies in the clean laundry. They are very fussy about underwear and these are the clear winners. They are also sturdy and are holding up great to frequent washing.


Super soft! Kids love!

My son and daughter both LOVE these undies. The fabric is super soft, and the kids were obsessed with the adorable prints!! 100% recommend especially if your kiddos have sensory sensitivities!


Our new fave undies!

Had to grab more of these WunderUndies after my boys fell in love with their first pairs and were always asking for their ice cream and donut undies! My oldest struggles with tags (we’re always cutting them out), so tagless undies are a must for us. They’re also super soft, which is another win for sensory sensitivities. Even my little one, who’s in the ‘No get dressed’ phase these days, loves picking out his undies each day. Those fun prints make all the difference! We love our WunderUndies and will definitely be back for more. 💜

SizeHips (in)Waist (in)

For Undies, measure hips.
If between sizes, size up.

a cartoon girl in her underwear showing how to measure properly for your clothes.


WunderUndies briefs are true to size!! Please consult the size chart for the best fit.

WunderUndies boxer briefs run a little small in sizes 2T-8. If your child measures perfectly into a size, SIZE UP ONE. If they are between sizes, SIZE UP TWO. If your child measures into size 8, getting a size 10 will work.

We have a coupon code for first time customers running at all times. You can get your first pair for just $5 with free shipping. Why? Because WunderUndies are here as a solution to a problem and I believe they’re an excellent one. But they may not be YOUR solution. So this is an easy way for you to try them out for your child without forking out a ton of money. If they’re the answer to your undie woes, I’m certain you’ll be back for more.

Just join the mailing list to get the coupon code.

WunderUndies ships every Monday and Friday! So if you place your order over the weekend it will ship out Monday afternoon! If you place your order Monday-Thursday it will ship out Friday afternoon. 

If you really need them faster, that’s an option!! Simply add the RUSH option to your cart which will mean that your order will be sent same day or next day (time of day depending). For a faster shipping method, you can choose that when you check out.

Return policies with underwear are tricky, aren’t they?

If a package is unopened, it can be returned within 30 days. Otherwise, we are unable to accept returns due to the nature of the product. You wouldn’t want to buy undies someone else had worn, would you?

If you have are at all worried about choosing the correct size, please contact me and let me know. I will do my best to make you happy.

WunderUndies should be washed on cold and dried on low. No bleach products. Iron on medium heat. Got stains? Check out the power of blue Dawn.

Bamboo fabric is celebrated for its exceptional softness and breathability.  Its natural moisture-wicking properties help regulate body temperature by wicking away sweat, so you’re always comfortable. Moreover, bamboo cultivation is environmentally friendly, as it requires minimal water and pesticides, making it a sustainable choice for eco-conscious consumers.

In addition to bamboo, our undies are also made of 27% organic cotton. Why does that matter? Well, bamboo can be a little finicky about the wash. The combination of bamboo and cotton make for a much more cooperative and easy-to-care-for garment without sacrificing any incredible softness.

Yes! If you spend over $50 on our website you will qualify for free shipping in the continental US. It will be automatically added as an option in your cart but you do have to choose it.

Unfortunately not at this time. Although it is a goal for the future!

We ship from Monroeville, Pennsylvania which is just outside of Pittsburgh! Shipping days are Mondays and Thursdays unless it’s a holiday.

Our products are designed in Pittsburgh, PA and made in China. We realize that that carries a stigma of cheaply made and horrible labor practices. But we didn’t choose this lightly. Our production partner in China was chosen by me personally. Not only do they have all of the proper certifications but I sent a representative to make sure that everything was operating ethically, on site. She only had excellent things to say. It’s a small factory so there aren’t any huge machines doing the work. It is people. And I assure you that the products are of very high quality. And that’s coming from me, a very picky seamstress.

two cartoon children wearing purple capes and underwear and reaching for a star