winter sleep sack 12-18 months
Skip itSoft demand (-64.8% this quarter) — this niche doesn't clear our bar today.
Avg price
Incredible$24.77avg listing price — sweet spot $15–$100
Price range
Incredible$14.84–$50.74cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Great35%top-5 click share — an open shelf
Brand share
Good61%top-5 brand share — brands hold most of the demand
Review moat
Good1,148.04avg incumbent reviews — the moat a new listing must climb
Returns
Bad5.4%return rate — above 5% kills the launch gate
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Conversion
Bad1.0%search→purchase rate — share of searches ending in a sale
Market size
Bad$6K$6K/yr · 26K searches
Growth
Bad-64.8%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, winter sleep sack 12-18 months is a $6K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 61% of demand. Demand peaks in Sep–Oct–Nov–Dec. Verdict: Skip it — 38/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
winter sleep sack 12-18 months market data
- Units sold / yr
- 500–750
- avg 0–100/product
- Revenue / yr
- $12K–$19K
- units × avg price
- Conversion rate
- 1.0%
- Avg BSR
- #813
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 92%
- Out of stock
- 17.7%
- Avg brand age
- 39 months
- Avg seller age
- 181 days
Competition & brand share
Clicks spread well past the top 5 (35% combined) — an open shelf where new products get seen.Brands
16 rising
Sellers
22
Top-5 brand share
61%
Top 20: 100%
Top-5 click share
35%
Top 20: 90%
Open market
33%
- Yoofoss30%
- Hudson Baby8%
- Looxii8%
- Unnivoll8%
- BubblePanda7%
- Okayinn6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -64.8% search growth over the last 90 days.Peak months: Sep, Oct, Nov, Dec · busiest ÷ quietest = 31.4×
Top winter sleep sack 12-18 months search terms
- warm sleep sack 12-18 months11K/yr
- winter sleep sack 12-18 months12K/yr
- sleep sack 12-18 months winter3K/yr
Top winter sleep sack 12-18 months products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Yoofoss Baby Sleep Sack 12-18 Months TOG 2.5 Winter Baby Wearable Blanket 100% Organic Cotton Toddler Sleeping Sack 2-Way Zipper Warm Quilted Sleep Sack
Yoofoss$24.394.6★1,764 rev
Yoofoss Baby Sleep Sack 12-18 Months Long Sleeve Sleep Sack 1.5 Tog Fleece Baby Wearable Blanket with 2-Way Zipper Soft Warm
Yoofoss$20.684.4★334 rev
Looxii Baby Sleep Sack - 12-18 Months 2.5 TOG Wearable Blanket Cotton Quilted Toddler Sleeping Sack with 2-Way Zipper for Warm Winter
Looxii$19.124.6★210 rev
Hudson Baby Unisex Baby Plush Sleeping Bag Sack Blanket Gray Clouds 12-18 Months
Hudson Baby$15.344.6★916 rev
BubblePanda Rayon Made from Bamboo Sleep Sack 12-18 Months 1.0 Tog Soft Toddler Sleeping Sack for Babies 2-Way Zipper Baby Wearable Blanket
Okayinn$26.344.6★1,884 rev
Newest
by launch date
CUDDLEBAMBOO Bamboo Viscose 1.0 Tog Sleep Sack 6-12-18 Months Soft Breathable Baby Sleeping Bag Wearable Blanket Baby with 2-Way Zipper Sage
CUDDLEBAMBOO$28.4347 rev
Yoofoss Baby Sleep Sack 12-18 Months 1.0 Tog Long Sleeve Sleep Sack Organic Cotton Wearable Blanket for Toddlers 2-Way Zipper Quilted Sleeping Sacks(Large)
Yoofoss$19.87455 rev
Yoofoss Baby Sleep Sack 12-18 Months Long Sleeve Sleep Sack 1.5 Tog Fleece Baby Wearable Blanket with 2-Way Zipper Soft Warm
Yoofoss$20.68334 rev
Unnivoll Baby Sleep Sack 12-18 Months TOG 2.5 Winter Baby Wearable Blanket 100% Cotton Fabric Newborn Infant Sleeping Sack 2-Way Zipper Quilted Baby Sleep Bag Warm Soft Green
Unnivoll$18.25448 rev
Yoofoss Baby Sleep Sack 12-18 Months Long Sleeve Sleep Sack 1.5 Tog Fleece Baby Wearable Blanket with 2-Way Zipper Soft Warm
Yoofoss$26.58334 rev
Trending
90-day click momentumCUDDLEBAMBOO Bamboo Viscose 1.0 Tog Sleep Sack 6-12-18 Months Soft Breathable Baby Sleeping Bag Wearable Blanket Baby with 2-Way Zipper Sage
CUDDLEBAMBOO$28.434.6★
Supersoft Rayon Made from Bamboo Sleep Sack 12-18 Months 1.0 Tog Toddler Sleep Sack Baby Wearable Blanket with 2-Way Zipper Unisex Sleeping Bag for Babies All-year-around - Pink
EasyFi$22.274.7★
Unnivoll Baby Sleep Sack 12-18 Months 3 Pack 100% Cotton Lightweight 0.5 TOG Wearable Blanket Baby Sleep Bag with 2-Way Zipper for Infant Toddler Blue
Unnivoll$27.364.8★
Yoofoss Fleece Baby Sleep Sack 12-18 Months with Plush Dots TOG 1.5 Baby W
Yoofoss$24.464.8★
Yoofoss Baby Sleep Sack 12-18 Months Long Sleeve Sleep Sack 1.5 Tog Fleece Baby Wearable Blanket with 2-Way Zipper Soft Warm
Yoofoss$20.684.4★
What buyers say about winter sleep sack 12-18 months
What buyers praise and complain about, mined from review topics.What buyers love
“Crazy soft”
“product is very well made”
“cozy all night”
“Great size”
“comfortable”
“Accurate description”
“It is thicker than any tog 2 Ive used on the past”
“These are warm”
“Soft and durable”
“Great price”
What buyers complain about
“Runs big”
“Didn't like the feel of the material, returned”
“But the zippers are very bulky”
“Item was thicker than expected”
“long drying times”
“when I washed the sleep sacks one of the zippers broke on one of them”
“1 star for the misleading nature of the listing”
“was hesitant given the price point”
“They arent like other 1.5 TOG sleep sacs”
“Chemical smell”
Top return reasons
Common questions
- Is winter sleep sack 12-18 months profitable to sell on Amazon United States?
- The niche generates $6K/yr across 26 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -64.8%. Flapen's verdict: Skip it (38/100).
- How competitive is the winter sleep sack 12-18 months niche?
- 16 brands and 22 sellers compete. The top 5 products take 35% of clicks and top 5 brands hold 61% of demand.
- What do buyers complain about in winter sleep sack 12-18 months?
- Top complaints mined from reviews: Size-Overall, Material Quality, Zipper Quality. The return rate is 5.4% — above our launch gate.
- When does demand for winter sleep sack 12-18 months peak?
- Demand peaks in Sep–Oct–Nov–Dec; the busiest month runs 31.4× the quietest.
- What does it cost to enter the winter sleep sack 12-18 months niche?
- Listings span $14.84–$50.74; the average listing price is $24.77 (sweet spot $15–$100). The average incumbent carries 1,148 reviews — the moat a new listing must climb.