---
title: "Sleep Sacks 12-18 Months — $93K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/sleep-sacks-12-18-months"
last_updated: "2026-08-06T06:02:30.259Z"
locale: en
meta:
description: "Niche score 48/100 · $93K/yr market · 132K searches/yr · $28.19 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $93K/yr market · 132K searches/yr · $28.19 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Sleep Sacks 12-18 Months — $93K/yr Amazon US Niche (2026) - Flapen"
---
# **sleep sacks 12-18 months**
**Skip it**
Strong incumbent ratings (4.7★) — this niche doesn't clear our bar today.
Market size 23Growth 46Conversion 31Competition 79Returns 36Price range 92Avg price 95Brand share 56Review moat 42Quality gap 19
**Avg price**
**Incredible****$28.19**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.24–$75.79**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Great****36%**
top-5 click share — an open shelf
**Brand share**
**Good****71%**
top-5 brand share — brands hold most of the demand
**Growth**
**Okay****+16.4%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****2,328.82**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****4.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****2.5%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$93K**
$93K/yr · 132K searches
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, sleep sacks 12-18 months is a $93K/yr Amazon United States market (132K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Mar–Apr. Verdict: Skip it — 48/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **sleep sacks 12-18 months market data**
- **Units sold / yr**
- **3K–4K**
- avg 0–100/product
- **Revenue / yr**
- **$85K–$113K**
- units × avg price
- **Conversion rate**
- **2.5%**
- **Avg BSR**
- **#423**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **89%**
- **Out of stock**
- **0.7%**
- **Avg brand age**
- **45 months**
- **Avg seller age**
- **170 days**
## **Competition & brand share**
Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.
**Brands**
**22 **▲rising
**Sellers**
**27**
**Top-5 brand share**
**71%**
Top 20: 99%
**Top-5 click share**
**36%**
Top 20: 72%
**Open market**
**25%**
- KeaBabies30% - Okayinn13% - FIEMOL12% - Wrrernsin9% - Yoofoss7% - EasyFi4%
## **Demand & seasonality**
Weekly Amazon search volume, last 75 weeks — +16.4% search growth over the last 90 days.
4K3KSpike '25Spike '26 seasonFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Mar, Apr · busiest ÷ quietest = 3.3×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/sleep-sacks-12-18-months/trend)
## **Top sleep sacks 12-18 months search terms**
- **sleep sacks 12-18 months**34K/yr-14.6%2.3% conv. - **keababies sleep sack**19K/yr+33.8%1.2% conv. - **summer sleep sack 12-18 months**6K/yr+170.9%2.7% conv. - **0.5 tog sleep sack 12-18 months**6K/yr+283.4%2.7% conv. - **5 tog sleep sack 12-18 months**5K/yr+133.2%2.5% conv. - **sleep sack 12-18 months 1.0 tog**14K/yr-31.2%1.0% conv. - **sleepsack 12-18 months**9K/yr-6.2%2.9% conv. - **kea babies sleep sack**7K/yr+20.0%0.9% conv. - **cotton sleep sack 12-18 months**7K/yr+14.0%1.9% conv. - **weighted sleep sack 12-18 months**10K/yr-23.8%0.4% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/sleep-sacks-12-18-months/search-terms)
## **Top sleep sacks 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.
0%2%$2K4%$4K6%$6K8%$7K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**2-Pack Baby Sleep Sacks Zipper Wearable Blanket - 100% Organic Cotton 0.5TOG Soft Lightweight Toddler Sleeping Sack 6-12 months Easy to Wear Newborn Swaddles Sleepsack (BumbleBear M)**KeaBabies**$25.44**4.7★278 rev](https://www.amazon.com/dp/B0CQT7WSR5) [2**FIEMOL Baby Sleep Sack 12-18 Months 100% Cotton Sleeping Sack for Newborn and Infant 3 Pack Baby Wearable Blanket 0.5 Tog Lightweight Double Zipper Sleep Bag Cyan**FIEMOL**$22.82**4.7★1,293 rev](https://www.amazon.com/dp/B0CQLX5DR4) [3**Wrrernsin Baby Sleep Sack 12-18 Months Baby Wearable Blanket 100% Cotton TOG 0.5 2-Way Zipper Newborn Sleeping Bag 3 Pack Comfy Lightweight Sleep Sacks for Babies**Wrrernsin**$22.58**4.7★659 rev](https://www.amazon.com/dp/B0F2DSXHQF) [4**2-Pack Organic Baby Sleep Sacks 100% Cotton - Soft & Breathable 0.5TOG Baby Wearable Blanket Toddler Sleeping Sack 6-18 Months Easy to Wear Swaddles for Newborns Infants (Glacier M)**KeaBabies**$26.06**4.6★1,007 rev](https://www.amazon.com/dp/B0D9JQDX3T) [5**2-Pack Organic Baby Sleep Sacks 100% Cotton - Soft & Breathable 0.5TOG Baby Wearable Blanket Toddler Sleeping Sack 6-18 Months Easy to Wear Swaddles for Newborns Infants (Butterflies M)**KeaBabies**$25.39**4.6★1,007 rev](https://www.amazon.com/dp/B0C5HQ26P2)
**~~View all top sellers →~~**
### **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**$28.43**47 rev9mo ago](https://www.amazon.com/dp/B0FS7LFSGD) [**FIEMOL Baby Sleep Sack 12-18 Months 0.5 TOG Wearable Blanket for Baby Boy and Girl 2-Way Zipper Toddler Sleeping Bag 2 Pack Lightweight Sleep Sacks Blue WhaleLarge**FIEMOL**$14.41**168 rev10mo ago](https://www.amazon.com/dp/B0FGD5ZJKT) [**Looxii Baby Sleep Sack 0.5 TOG 100% Cotton 3 Pack Wearable Blanket Baby Sleep Bag for Newborn Infant 2-Way Zipper Lightweight Toddler Sleeping Sack 12-18 Months**Looxii**$24.69**363 rev1y ago](https://www.amazon.com/dp/B0DX782P9B) [**Wrrernsin Baby Sleep Sack 12-18 Months Baby Wearable Blanket 100% Cotton TOG 0.5 2-Way Zipper Newborn Sleeping Bag 3 Pack Comfy Lightweight Sleep Sacks for Babies**Wrrernsin**$22.58**659 rev1y ago](https://www.amazon.com/dp/B0F2DSXHQF) [**FIEMOL Baby Sleep Sack 12-18 Months Long Sleeve Baby Wearable Blanket 0.5 Tog with Mittens 2-Way Zipper Toddler Cotton Sleeping Sack for Boy and Girl Green Dinosaur 2 Pack(Large)**FIEMOL**$23.69**324 rev1y ago](https://www.amazon.com/dp/B0DRNZSPSX)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$28.43**4.6★**▲ 65%**](https://www.amazon.com/dp/B0FS7LFSGD) [**2-Pack Baby Sleep Sacks Zipper Wearable Blanket - 100% Organic Cotton 0.5TOG Soft Lightweight Toddler Sleeping Sack 12-24 months Easy to Wear Newborn Swaddles Sleepsack (BumbleBear L)**KeaBabies**$26.69**4.7★**▲ 62%**](https://www.amazon.com/dp/B0CS623CH2) [**2-Pack Organic Baby Sleep Sacks 100% Cotton - Soft & Breathable 0.5TOG Baby Wearable Blanket Toddler Sleeping Sack 0-6 Months Easy to Wear Swaddles for Newborns Infants (Butterflies S)**KeaBabies**$25.72**4.6★**▲ 62%**](https://www.amazon.com/dp/B0CVXBJ4Q4) [**2-Pack Baby Sleep Sacks Zipper Wearable Blanket - 100% Organic Cotton 0.5TOG Soft Lightweight Toddler Sleeping Sack 12-24 months Easy to Wear Newborn Swaddles Sleepsack (Roarsome L)**KeaBabies**$26.60**4.7★**▲ 32%**](https://www.amazon.com/dp/B0D8W9NNB5) [**BubblePanda Rayon Made from Bamboo Sleep Sack 12-18 Months 0.5 Tog Soft Lightweight Toddler Sleep Sack 1t for Babies 2-Way Zipper Wearable Blanket Baby 12 Months**Okayinn**$25.95**4.6★**▲ 28%**](https://www.amazon.com/dp/B0CMTGVP9K)
**~~View all trending →~~**
## **What buyers say about sleep sacks 12-18 months**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Soft Feel**20%
*“Crazy soft”*
**Sleep Quality**13%
*“Good purchase comfortable sleep”*
**Quality-Overall**12%
*“Great quality sleep sack”*
**Value For Money**6%
*“price is reasonable”*
**Comfort-Overall**6%
*“Amazingly soft and comfortable”*
**Size-Overall**5%
*“the overall fit feels secure”*
**Advertised Vs Actual Product**3%
*“its exactly how it shows in the photo”*
**Weight Light**3%
*“Its a good weight, breathable”*
**Warmth**3%
*“Great very soft keeping warm enough”*
**Zipper Quality**2%
*“zipper function is great”*
### **What buyers complain about **
**Size-Overall**19%
*“Way too wide”*
**Zipper Quality**7%
*“Broken Zipper after 3-4ish months”*
**Thickness**5%
*“Thin fabric”*
**Material Quality**5%
*“cheap materials”*
**Durability**3%
*“broken after 2 months”*
**Velcro Quality**3%
*“Velcro is annoying”*
**Quality-Overall**3%
*“Buy Quality Not This Trash”*
**Sleep Quality**2%
*“Im not able to unzip the sleep sack”*
**Value For Money**2%
*“Ill be looking at the more expensive options in hopes for a better product”*
**Washability**2%
*“Bought two both couldnt last through one gentle wash cycle without ripping”*
### **Top return reasons **
**Size-Overall**58%
**Material Quality**5%
**Thin**4%
**Advertised Vs Actual Product**3%
**Zipper Quality**3%
**Thickness**3%
**Width**2%
**Length**2%
**Value For Money**2%
**Warmth**2%
## **Common questions**
- **Is sleep sacks 12-18 months profitable to sell on Amazon United States?**
- The niche generates $93K/yr across 56 tracked products. 6 of 9 products launched in the last 360 days are still selling. 90-day search growth is +16.4%. Flapen's verdict: Skip it (48/100).
- **How competitive is the sleep sacks 12-18 months niche?**
- 22 brands and 27 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 71% of demand.
- **What do buyers complain about in sleep sacks 12-18 months?**
- Top complaints mined from reviews: Size-Overall, Zipper Quality, Thickness. The return rate is 4.1%.
- **When does demand for sleep sacks 12-18 months peak?**
- Demand peaks in Mar–Apr; the busiest month runs 3.3× the quietest.
- **What does it cost to enter the sleep sacks 12-18 months niche?**
- Listings span $12.24–$75.79; the average listing price is $28.19 (sweet spot $15–$100). The average incumbent carries 2,329 reviews — the moat a new listing must climb.
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