Big Mo Kids Sleeping Bag (18-36 months)

Color - Bayberry Blue
Insulation Type

New for 2024! We've taken the original Big Mo 20° Kids Sleeping Bag and added the most commonly requested feature: adjustable open-and-closed cuffs. We've also tweaked the sizing to give it a closer, cozier fit. 

As always, the Big Mo features thick channels of RDS-certified down, a 2-way zipper, and room to grow for your little adventurers.

The Big Mo with synthetic insulation is recommended for average temperatures as low as 40°F/4°C, while the Big Mo 20 can be used in temperatures as low as 20°F/-6°C.

Size & Specs

The Big Mo Baby Sleeping Bag is for children 18-36 months and 30-40in (74-101cm) long.

Big Mo 20 with Down Fill

 Feature Big Mo 20
(down fill)
Best Use Backpacking, 3-season camping
20°-60°F (-6°-15°C)
Length 38in (97cm)
Weight 11.6oz (330g)
Insulation Type 650 fill-power RDS-Certified White Duck Down
Fill Weight 5.3oz (150g)
Shell Material 100% Ripstop Nylon


Big Mo 40 with Synthetic Fill

 Feature Big Mo 40 (synthetic fill)
Best Use Car camping, summer camping


40°-60°F (4°-15°C)
Length 38in (97cm)
Weight 1lb 2oz (498g)
Insulation Type Hi-loft Synthetic Insulation
Fill Weight 12.7oz (360g)
Shell Material 100% Ripstop Nylon
Safety & Care


For children 18 – 36 months and 30-40 in (76-101 cm) long.

1. Only for ages 18-36 months – Younger children can slip down and suffocate inside.

2. Monitor child’s temperature – If child is too warm or shows signs of overheating, remove from sleeping bag.

3. Do not allow your child to walk in sleeping bag.

4. Keep far away from campfire and ignition sources.

Cleaning your Big Mo

For best results, wash inside mesh or fabric laundry bag. Zip closed before laundering. Machine wash cold with like colors, gentle cycle, in a front-loading washer. Use mild powdered detergent or down wash. Rinse at least twice. Remove promptly. Do not wring. Do not use bleach or fabric softeners. Tumble dry low with 2 clean tennis balls. Remove and fluff after each cycle, returning to dryer until fully dry. Do not iron. Do not dry clean.

Pack the Fun.

Ultra-light and ultra-warm, yes. But Big Mo sleeping bags are so much fun to wear, they won't want to take it off.


Adjustable Cuffs

Hands out during the day. Hands in at night.

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 Big Mo Sleeping Bag packs down small for easy carrying.

Weigh Your Options

While the Big 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 Big Mo 20.

This Purchase Gives Back

This quarter, we are proud to donate 1% of all sales to Outgrown, helping young families spend more time outdoors.

Learn More