The "I rolled out of my sleeping bag" era of camping is officially over. The Mighty Mo is a parent-designed, wearable sleeping bag that ensures your preschooler stays warm, snug, and safe all night long. Built like a cozy parka but engineered like a technical sleeping bag, the Mighty Mo gives your "mini-mountaineer" the freedom to move without the risk of waking up cold.
Why Parents (and Kids) Love the Mighty Mo
It Stays On: No matter how much they toss and turn, this bag moves with them. No more 3:00 AM "cold kid" wake-up calls.
Freedom to Move: Features adjustable open-and-close cuffs, so they can use their hands for bedtime stories or early morning s’mores, then tuck them away for maximum warmth.
Professional Warmth: Choose between ultralight 650-fill RDS Down for alpine adventures or Hi-Loft Synthetic for damp conditions and easy-care car camping.
2-Way Temperature Control: The dual-zipper system allows you to vent the bottom for airflow on warmer nights or keep it fully sealed when the frost sets in.
Key Technical Specs Fit: Designed for children 3 to 5 years old (36" to 50" tall). Total Length: 46 inches (116 cm). Draft Protection: Includes an insulated draft tube along the zipper to prevent cold air from seeping in. Easy Care: Both versions are machine washable. The nylon shell is weather-resistant and can be wiped clean after minor trail mishaps. Safety First: Designed with a snug, soft collar to ensure your child’s head stays safely outside the bag while their body stays warm inside.
Pro Tip: If you're backpacking or camping in cold weather, go for the Mighty Mo 20 with down insulation —it's significantly more compressible and offers the best warmth-to-weight ratio for cold mountain nights.
The Mighty Mo Kids Sleeping Bag is for children 3-5 years and 36-50in (91-116cm) long.
The lightest, warmest sleeping bag with sleeves for kids 3-5 years old.
Features
Warm & Cozy
Whatever the weather, the Mighty Mo has you covered. Our sleeping bags are puffy, fun to wear, and never get kicked off while sleeping. The enclosed footbox gives room to move little legs while keeping toes extra cozy, and the insulated draft tube helps trap warmth inside.
Premium Insulation
Our down-insulated sleeping bags use 100% RDS-certified down, which guarantees that our down comes from animals that are humanely raised, and never live-plucked or force-fed.
Going synthetic? Our synthetic fill is lofty, cozy, and performs better than down when it gets wet
Easy Cleaning
After your big adventure, the last thing you want to worry about is a fussy clean-up. Our bags are made from a weather-resistant nylon so you can easily wet and wipe when you’re on-the-go. Once you’re home, toss your sleep sack into your washing machine for quick and easy cleaning.
Trade-In Eligible
YES! This item is eligible for trade-in.
Buy with confidence today & trade it in later for store credit towards your next purchase.
Interested in learning more? Visit our trade-in page:
Every Morrison Outdoors sleeping bag has adjustable open-and-close cuffs for total hand freedom.
Easy to Pack
Whether you get choose goose down or synthetic fill, the Mighty Mo Sleeping Bag packs down small for easy carrying.
Weigh Your Options
While the Mighty Mo 40 with synthetic insulation has all the snug you need for summer camping, you can save weight and camp in colder temperatures with the down-filled Mighty Mo 20.
Trade-In Your Outdoor Gear for Store Credit
Kids grow fast. That's why we created our trade-in program!
Our Mighty Mo Kids Sleeping Bags are eligible for trade-in. Buy today, trade-in later & receive store credit towards your next MO purchase!
The reason why I gave it 3 stars is due to the color. My son's first one was a lava red synthetic but for his second one we went with down. He chose the lava red one but the actual color is more like a coral and that is what disappointed me. I was expecting the down version to be the same red as the synthetic but that is not the case.
I reached out via email inquiring about the color difference and never got a response.
Erin G.3/5
Bought this sleeping bag for our camping trips and our little one absolutely loves it! So much that she asked for her sleeping bag back in her bed 😂 kept her snuggly and warm and she doesn’t wriggle out of it
Nikki F.5/5Verified
Glad I found sleep bags big enough. She would have wiggled right out of a normal sleeping bag.
Morgan R.5/5Verified
We have 3 of these for the littles and they are perfect for winter and spring camping. I dont have to worry about the kids wiggling out of them in the night and they stay nice and cozy. They are also safe to use for infants and you dont have to worry about their face being covered. We will continue to get the next size up as the kids get bigger and hand these down to out backpacking friends. These are a must when camping with kiddos.
Megan K.5/5
This sleeping bag is great! Our almost-3-year-old loves it. Really nice soft feel, keeps him warm, and great color (we got the red). Thanks for making great products!
Gay Gibson M.5/5Verified
My son LOVES this sleeping bag. He requested the next size up after he out grew the smaller one, and tells me he is so "cozy" and slept all night in this bag.
Elyse N.5/5Verified
I have baught the mighty Mo and thé Big Mo for my children of 1,5 and 4 and they love it! I already had a little Mo down (the old one) my first had used. The opening hands is a great change my older liked. 😉
As a french professionnal mountain leader, I will also provide my clients with them for camping in the french Alps when they have children. It's the best I found !
Bertille F.5/5Verified
Perfect!
We are a young family traveling for 8 months with our two kids (Levi is 3,5 years old and Miko 21 months). We are currently in Mongolia and spend most nights in our tent. We had different sleeping bags for the kids before, but they kept crawling out and we spent the nighs chasing after them trying to keep them warm... These are just perfect, and the kids love them. They even refuse to take them off in the morning!
Liza A.5/5Verified
Our toddler rolls a lot while he sleeps, and this sleeping bag was perfect to keep him warm no matter how he moved in the night.
Amanda M.5/5Verified
Great! We love the sleeping bag
Emily E.5/5Verified
Hoping this will keep our toddler warm as he refuses blankets.
Gk M.4/5Verified
Kept our toddler cozy all night long!
Tanya R.5/5Verified
Perfect! Love it!
Sarah C.5/5Verified
Awesome ! My Granddaughter LOVES it ! Outstanding Quality !
David H.5/5Verified
I am not allowed to post photos but my 3 year old great granddaughter loces the sleepsack. Upstate NY
Isabel N.5/5Verified
Daughter loves it and never wants to take it off
Amy S.5/5Verified
These down bags are so cozy, my kids always sleep great when we camp in fall and winter with nights between 20F and 40F. That way, I can get a good night sleep too. I never worry about them getting chilled. And for me, a good nights sleep is priceless.
Kate B.5/5Verified
My kiddo loves her Morrison Sleeping Bags! It gives us so much peace to know she has a good warm sleeping bag that will be comfortable for her and keep her safe! The Morrison team was also so helpful when buying this particular bag! I wanted to get her the next size up because she has grown out of her first Morrison and they were very helpful in guiding me towards the right size for her!
Madison J.5/5Verified
Bonjour, c'est la deuxième grandeur que l'on a de ce modèle, utilisé pour plus de 75 nuits de camping....Ça réchauffe bien notre enfant dans les températures indiquées. De bonnes nuits paisibles. Bien conçu et facile d'entretien. Je recommande fortement.
Richard B.5/5Verified
We just LOOOOOOVE our sleeping bags. Our adventures with our little ones wouldn't be possible without them!
Antoine G.5/5Verified
This is the best thing to have for chilly weather camping! My 3 year old loves it and it makes bed time easy. Super cozy and keeps him warm in low 30’s temps. Nothing out there like it, highly recommend!!
Heather C.5/5Verified
We haven't used this bag yet, but we loved the infant one so much we had to trade it in and get the next size up. We will be able to use this sleeping bag for years!
Jackie T.5/5Verified
We got the down mighty mo 3-5yo sleeping bag for a december death valley camping trip. It is amazing, kept our daughter warm throughout the night without overheating, and no worries about her crawling out of it. Highly recommend, worth the cost for cold weather camping with a toddler.
Kendra G.5/5Verified
The BEST sleeping bag for kids! Both my kids (1yr and 4yr) were so comfortable and warm all night. My 4yr didn’t want to take it off!
Julia P.5/5Verified
Returns and Exchange
All new sleeping bags are eligible for a free return within 30 days of purchase.
Used sleeping bags are not eligible for returns but can be exchanged for other items.
Calling all little explorers! We’re giving one lucky family the chance to win a bundle of baby essentials made for cozy nights, outdoor adventures, and everything in between.