baby thermal set
Skip itSoft demand (-83.7% this quarter) — this niche doesn't clear our bar today.
Competition
Great26%top-5 click share — an open shelf
Avg price
Great$17.84avg listing price — sweet spot $15–$100
Brand share
Great59%top-5 brand share — no brand owns this niche
Price range
Great$9.63–$31.61cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Okay1,977.7avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Returns
Okay4.9%return rate — above 5% kills the launch gate
Conversion
Bad0.4%search→purchase rate — share of searches ending in a sale
Market size
Bad$9K$9K/yr · 120K searches
Growth
Bad-83.7%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, baby thermal set is a $9K/yr Amazon United States market (120K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Jan–Oct–Nov–Dec. Verdict: Skip it — 38/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
baby thermal set market data
- Units sold / yr
- 2K–3K
- avg 0–100/product
- Revenue / yr
- $36K–$45K
- units × avg price
- Conversion rate
- 0.4%
- Avg BSR
- #227
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 69%
- Out of stock
- 8.5%
- Avg brand age
- 41 months
- Avg seller age
- 181 days
Competition & brand share
Clicks spread well past the top 5 (26% combined) — an open shelf where new products get seen.Brands
28 rising
Sellers
32
Top-5 brand share
59%
Top 20: 96%
Top-5 click share
26%
Top 20: 57%
Open market
36%
- American Trends21%
- Simple Joys by Carter's14%
- Zando12%
- PUMYOON7%
- Burt's Bees Baby6%
- Hudson Baby5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -83.7% search growth over the last 90 days.Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 26.4×
Top baby thermal set search terms
- baby thermal13K/yr
- toddler thermal shirt15K/yr
- baby thermal set13K/yr
- baby thermals8K/yr
- ropa trmica para bebe6K/yr
- 2t thermal set6K/yr
- baby long johns5K/yr
- toddler long johns thermal set4K/yr
- thermal clothes for toddler4K/yr
- toddler thermal pants7K/yr
Top baby thermal set 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
Girls Underwear Kids Thermal Underwears Toddler Winter Base Layer Long Johns Sets for Boys A Black Medium (90) /2T-3T
American Trends$17.384.7★1,282 rev
Girls Underwear Kids Thermal Underwears Toddler Winter Base Layer Long Johns Sets for Boys A Black Large (100) /3T-4T
American Trends$16.914.7★1,210 rev
Simple Joys by Carters Unisex Babies Long-Sleeve Thermal Bodysuits Pack of 4 Beige/Dark Grey/Grey/Ivory 24 Months
Simple Joys by Carter's$15.044.9★9,311 rev
PUMYOON 3T 4T 5T 2T Thermal Underwear for Kids Toddler Thermal Underwear Set Boys Toddler Winter Clothes Black Pink
PUMYOON$16.824.5★211 rev
Simple Joys by Carters Baby 3-Pack Thermal Pants Beige/Dark Grey/Grey 6-9 Months
Simple Joys by Carter's$13.484.8★3,444 rev
Newest
by launch dateSimple Joys by Carters Unisex Babies Long-Sleeve Thermal Bodysuits Pack of 4 Beige/Dark Grey/Grey/Ivory 24 Months
Simple Joys by Carter's$15.049,311 rev
Simple Joys by Carters Baby 3-Pack Thermal Pants Beige/Dark Grey/Grey 6-9 Months
Simple Joys by Carter's$13.483,444 rev
Simple Joys by Carters Baby 2-Pack 2-Way Zip Thermal Footed Sleep and Play
Simple Joys by Carter's$14.766,974 rev
Simple Joys by Carters Baby 4-Pack Long-Sleeve Thermal Bodysuits
Simple Joys by Carter's$14.529,311 rev
PUMYOON 3T 4T 5T 2T Thermal Underwear for Kids Toddler Thermal Underwear Set Boys Toddler Winter Clothes Black Pink
PUMYOON$16.82211 rev
Trending
90-day click momentum
QBK 2T to Youth Boys Compression Shirt Toddler Kids Long Sleeve Baseball Football Undershirt Girls Quick Dry Athletic Base Layer(Black 4T)
QBK$13.554.8★
Burts Bees Baby Honeysoft Waffle Thermal Pajamas Organic Cotton & Lyocell Blend Breathable Buttery Soft Snug Fit Sizes 12M-12Y
Burt's Bees Baby$16.064.5★
QBK 2T to Youth Boys Compression Shirt Toddler Kids Long Sleeve Baseball Football Undershirt Girls Quick Dry Athletic Base Layer(Black M)
QBK$13.624.8★
JZCreater Thermal Underwear for Kids Boys Thermals Top & Bottom Set Long Johns Underwear Base Layer for Cold Winter/Skiing Black
JZCreater$14.684.6★
Simple Joys by Carters Baby 2-Pack 2-Way Zip Thermal Footed Sleep and Play
Simple Joys by Carter's$14.764.9★
What buyers say about baby thermal set
What buyers praise and complain about, mined from review topics.What buyers love
“This set is warm”
“Fit/size is consistent with other brands”
“The quality is great thick”
“Very comfortable”
“The material feels gentle on the skin”
“Great deal”
“soft material”
“Durable and good fit”
“These are great for our cool summer weather”
“Also the colors are SOO cute”
What buyers complain about
“Get one size up”
“Its literally spandex”
“the elastic in the trousers are uncomfortable”
“Not good quality”
“Shrink in dryer- size up”
“These are VERY thin”
“Clearly a used product”
“Feels too platicky to wear by a toddler”
“Baby sweat in it a lot that she got a heat rash that lasted 2 weeks”
“started coming apart at the seams”
Top return reasons
Common questions
- Is baby thermal set profitable to sell on Amazon United States?
- The niche generates $9K/yr across 77 tracked products. 11 of 31 products launched in the last 360 days are still selling. 90-day search growth is -83.7%. Flapen's verdict: Skip it (38/100).
- How competitive is the baby thermal set niche?
- 28 brands and 32 sellers compete. The top 5 products take 26% of clicks and top 5 brands hold 59% of demand.
- What do buyers complain about in baby thermal set?
- Top complaints mined from reviews: Size-Overall, Material Quality, Stretchability/Expandability/Elasticity. The return rate is 4.9%.
- When does demand for baby thermal set peak?
- Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 26.4× the quietest.
- What does it cost to enter the baby thermal set niche?
- Listings span $9.63–$31.61; the average listing price is $17.84 (sweet spot $15–$100). The average incumbent carries 1,978 reviews — the moat a new listing must climb.