Morrison Outdoors Big Mo 20 — toddler down sleeping bag

Published · Researched 2026-09-21

Identifiers. Morrison Outdoors Big Mo 20, 20°F down-filled wearable sleeping bag; ages 18–36 months, 30–40 in (76–101 cm) child height. REI item 232423. Lineup note. The Big Mo 20 is the middle size of Morrison's three wearable bags: Little Mo (6–24 months) < Big Mo (18–36 months) < Mighty Mo (3–5 years); each comes in a 20°F down and a 40°F synthetic version. This dossier is the 20°F DOWN Big Mo — not the Big Mo 40 synthetic.

2023–2026 lineage

• Big Mo launched alongside the Little Mo (2021–2022) as the brand's second size; the Mighty Mo followed for preschoolers.
• Current spec: 20°F rating, 11.6 oz (330 g), 650-fill-power RDS white duck down, 38 in length.
• One 2025 review table (haileyoutside) lists the Big Mo 20 at 13.1 oz / 370 g — conflicting with the official 11.6 oz; treat the official figure as current and the 370 g as an older or mis-recorded unit.
• MSRP moved $179.95 (tetonfamilymagazine) → ~$180 (haileyoutside, 2025) → Outdoor Life's 2026 gear guide cites "Big Mo" at ~$180.

Overview

The Big Mo 20 solves the problem every family camper knows: toddlers kick off blankets and wriggle out of adult bags, then wake up cold at 2 a.m. It is a wearable, arm-sleeved down sleeping bag — essentially a puffy onesie with an enclosed footbox — so the child literally cannot kick it off. The 20°F down version is the 3-season/backpacking pick (the 40°F synthetic is the summer/car-camping one). At 11.6 oz it compresses to roughly the size of a Nalgene bottle. The family-outdoor community (Hike It Baby/Outgrown, Kids Who Explore, Baby Can Travel, Tales of a Mountain Mama) treats Morrison as the default answer for safe toddler sleep outdoors: no loose blankets, no overheating-prone adult bags, and the enclosed footbox keeps little toes warm while arms move freely. Resale is unusually strong — Morrison partners with ReRouted for trade-ins, which keeps the effective cost of the short-lived 18–36-month window down.

Key specs

• MSRP: $179.95 (tetonfamilymagazine); $180 (haileyoutside 2025, Outdoor Life 2026). Synthetic Big Mo 40: $99.95–$100.
• Temperature rating: 20°F (–6°C) comfort range 20–60°F per Morrison; UNVERIFIED against EN/ISO testing — Morrison publishes its own rating scale, not an ISO 23537 test.
• Weight: 11.6 oz / 330 g (official; REI). One review lists 370 g — variance noted above.
• Fill: 5.3 oz / 150 g of 650-fill-power RDS-certified white duck down.
• Sizing: ages 18–36 months; fits children 30–40 in (76–101 cm) long; bag length 38 in / 97 cm; shoulder 28 in, hip 33 in (REI).
• Shell: 100% ripstop nylon.
• Packed size: 14 × 7 in stuff sack; ~4.5 L, 4 L compressed (REI).
• Features: enclosed footbox, insulated draft tube, adjustable open/close cuffs, bottom-up zipper for diaper changes, zippered storage sack included.
• Safety: Morrison's own size/age guidance — ages 18–36 months ONLY (younger children can slip down inside); monitor child temperature; do not let the child walk in the bag; keep away from fire. No CPSC recall found for any Morrison sleeping bag as of Sept 2026.

Pricing (USD, dated September 2026)

• MSRP: $179.95 / ~$180. Synthetic Big Mo 40: ~$100.
• REI sells the Big Mo 20 (item 232423); Morrison runs periodic direct sales. Trade-in via ReRouted: $25 cash or $30 store credit toward the next size.

Box contents

• Big Mo 20 bag + stuff sack. No pad, no pillow — sized for use with a standard short/wide sleeping pad or directly in the tent.

Warranty

• UNVERIFIED: Morrison's formal warranty terms were not confirmed in this round; the brand's Pledge 1% membership and ReRouted trade-in program are documented, but a written warranty length is unknown. Buyers should check morrisonoutdoors.com before purchase.

Parts & support

• Direct-to-consumer brand; support via morrisonoutdoors.com. ReRouted partnership handles resale/trade-in. No dealer network for in-person service.

CPSC recalls

• None found for Morrison Outdoors products as of September 2026.

Community verdict

• Social pulse (Sept 2026): the Big Mo is the consensus "safe toddler sleep" answer across family-camping groups — mentioned by name in Outgrown/Hike It Baby family resources, multiple mom-reviewers (Kids Who Explore, Adrianna Adventures, Hailey Outside, Baby Can Travel), and Outdoor Life's 2026 backpacking sleeping-bag guide. The themes are consistent: kids can't escape it, it's genuinely backpackable, and the down version's warmth-to-weight beats everything else in the category.
• What parents praise: no more kicked-off blankets; diaper changes without unzipping the whole bag; compresses tiny; strong resale.
• What parents complain about: arms are often outgrown before body length (sleeves run short on tall toddlers); the child's head still needs a warm hat in cold weather; price stings for an 18-month usable window; down version is harder to wash than synthetic.

Images

All six are the Big Mo wearable design (sleeved, enclosed footbox, front zip, Morrison branding); sources are explicitly Big Mo / Big Mo 20 pages. Sizing (Big vs Little vs Mighty) is not distinguishable in a photo — attribution carries the size.

1. images/morrison-outdoors-big-mo-20-1.jpg — green bag laid flat with stuff sack and hang tag (review photo).
2. images/morrison-outdoors-big-mo-20-2.jpg — green bag flat with "MORRISON OUTDOORS" chest print and tags.
3. images/morrison-outdoors-big-mo-20-3.jpg — purple colorway, studio flat (thebump).
4. images/morrison-outdoors-big-mo-20-4.jpg — lime colorway close-up, chest logo and zip detail (brand's own product page).
5. images/morrison-outdoors-big-mo-20-5.jpg — review composite: flat lay plus toddler sleeping in the bag in a tent.
6. images/morrison-outdoors-big-mo-20-6.jpg — green "LeapFrog" print, studio flat (NZ retailer).

Research footer

Researched 2026-09-21. Sources: morrisonoutdoors.com (official spec table); REI listing 232423; Baby Can Travel review; Kids Who Explore; Adrianna Adventures; Hailey Outside comparison table; Tales of a Mountain Mama round-up; Outgrown/Hike It Baby family resources; Outdoor Life 2026 best backpacking sleeping bags; tetonfamilymagazine; thebump. Pricing dated September 2026.

Durability & warranty reality

• Down is RDS-certified (ethically sourced); the ripstop nylon shell is reported to survive multiple kids in family reviews. Wash instructions are specific (front-loader, down wash, tennis balls, tumble low) — follow them or lose loft. Warranty terms UNVERIFIED (see above).

Annual history

• 2021–2022: Big Mo launches as the second size after the Little Mo.
• 2023: Mighty Mo (3–5 yr) completes the lineup.
• 2024–2026: spec sheet stable at 11.6 oz / $179.95–180; ReRouted trade-in program active; Outdoor Life includes it in its 2026 backpacking-bag guide.

Head-to-head

• vs Big Agnes Little Red 20: the Little Red is a conventional kid-sized mummy bag; the Big Mo is wearable — different sleep philosophies for different ages.
• vs REI Kindercone 25: Kindercone is the budget rectangular kid bag; Big Mo is the premium 3-season wearable.
• vs Teton Sports Celsius Junior 20: Teton is the value 20°F junior bag; Big Mo is lighter, warmer per ounce, and toddler-specific.

Care

• Machine wash cold, gentle, front-loader only, in a mesh laundry bag, zip closed, mild powdered detergent or down wash; rinse twice; tumble dry LOW with 2 clean tennis balls until fully dry. Do not wring, bleach, iron, or dry clean.

Traps

• Sizing is narrow by design (anti-suffocation): a tall 30-month-old may outgrow the sleeves before the body — check the 40 in max height against your child.
• The 20°F rating is Morrison's own scale, not ISO-tested; in true 20°F weather the child still needs insulated base layers and a warm hat.
• Do not use for children under 18 months (suffocation risk per Morrison) — that is the Little Mo's window.

Extra voices

• Kids Who Explore: "I can easily change my baby while keeping him in the sleeping bag so that he keeps all of his warmth. The zipper zips up from the bottom, making the diaper change access ideal."
• Hailey Outside: notes the strong resale market and the ReRouted partnership ($25 cash / $30 credit trade-in).
• Tales of a Mountain Mama: includes the Mo line in its family sleeping-bag round-up as the backpacking pick for under-5s.

Spec gap-fill

• UNVERIFIED: ISO/EN 23537 temperature test status; Morrison's formal written warranty; whether the 13.1 oz / 370 g figure in one 2025 review reflects a real older generation or a measurement error; live Sept 2026 street pricing vs MSRP.