thermal underwear for kids
Skip itSoft demand (-87.7% this quarter) — this niche doesn't clear our bar today.
Avg price
Great$21.61avg listing price — sweet spot $15–$100
Price range
Great$12.12–$62.37cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Great30%top-5 click share — an open shelf
Brand share
Great58%top-5 brand share — no brand owns this niche
Review moat
Good1,144.77avg incumbent reviews — the moat a new listing must climb
Market size
Okay$249K$249K/yr · 1.0M searches
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Returns
Bad7.9%return rate — above 5% kills the launch gate
Conversion
Bad1.1%search→purchase rate — share of searches ending in a sale
Growth
Bad-87.7%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, thermal underwear for kids is a $249K/yr Amazon United States market (1.0M searches/yr). The top 5 brands hold 58% of demand. Demand peaks in Jan–Feb–Oct–Nov–Dec. Verdict: Skip it — 45/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
thermal underwear for kids market data
- Units sold / yr
- 20K–25K
- avg 250–500/product
- Revenue / yr
- $432K–$540K
- units × avg price
- Conversion rate
- 1.1%
- Avg BSR
- #26
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 95%
- Out of stock
- 9.0%
- Avg brand age
- 44 months
- Avg seller age
- 147 days
Competition & brand share
Clicks spread well past the top 5 (30% combined) — an open shelf where new products get seen.Brands
30 falling
Sellers
79
Top-5 brand share
58%
Top 20: 94%
Top-5 click share
30%
Top 20: 63%
Open market
37%
- TELALEO22%
- Spyder13%
- Rocky8%
- Rolimaka8%
- American Trends7%
- Cuddl Duds6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -87.7% search growth over the last 90 days.Peak months: Jan, Feb, Oct, Nov, Dec · busiest ÷ quietest = 28.7×
Top thermal underwear for kids search terms
- thermal underwear for kids143K/yr
- kids thermal underwear set139K/yr
- boys thermal set96K/yr
- kids thermals48K/yr
- toddler thermal set101K/yr
- thermals for kids61K/yr
- girls thermal underwear set54K/yr
- long underwear boys26K/yr
- long johns for kids63K/yr
- base layer kids26K/yr
Top thermal underwear for kids 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
TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set M
TELALEO$18.554.8★2,926 rev
TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set S
TELALEO$18.644.8★2,926 rev
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black
Spyder$20.914.7★208 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
TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set XS
TELALEO$18.524.8★2,926 rev
Newest
by launch date
Rolimaka Boys Thermal Underwear Set kids Fleece Lined Leggings Pants Compression Long Johns Base Layer Top and Bottom M
Rolimaka$14.14165 rev
WELAKEN Girls Warm Thermal Underwear Set Kids Winter Base Layer Long Johns Sets for Cold weather/skiing Pink
WELAKEN$18.87147 rev
JZCreater Thermal Underwear for Kids Boys Thermals Top & Bottom Set Long Johns Underwear Base Layer for Cold Winter/Skiing Black
JZCreater$14.6839 rev
JZCreater Thermal Underwear for Kids Boys Thermals Top & Bottom Set Long Johns Underwear Base Layer for Cold Winter/Skiing Black
JZCreater$16.0639 rev
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black
Spyder$20.91208 rev
Trending
90-day click momentum
Runhit Thermal Underwear for Kids Long Johns Ultra Soft Long Sleeve Shirts Sets Skiing Base Layer Fleece Lined Pants Suit Black M
Runhit$12.864.7★
JZCreater Thermal Underwear for Kids Boys Thermals Top & Bottom Set Long Johns Underwear Base Layer for Cold Winter/Skiing Black
JZCreater$14.684.6★
Cuddl Duds Girls Heavyweight Fleece Lined 2 Piece Thermal Underwear Set Long Sleeve Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Kids Off White M
Cuddl Duds$26.754.4★
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Heather Grey
Spyder$20.494.7★
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black
Spyder$20.914.7★
What buyers say about thermal underwear for kids
What buyers praise and complain about, mined from review topics.What buyers love
“Cozy and warm”
“For my two grandsons they fit”
“Excellent quality, perfect fit, delivered just in time”
“Very comfortable”
“Good price”
“Durable, good quality”
“The material feels gentle on the skin”
“The material was comfortable”
“Just as advertised”
“Nice stretch too”
What buyers complain about
“They do run a little bit big”
“Poor Quality”
“Cheap material”
“It came used”
“Thermal fabric pills badly”
“The material isnt too thick”
“I just wish they were a little cheaper”
“smells chemically out of package”
“the set hasnt stretched out”
“tight around the wrist”
Top return reasons
Common questions
- Is thermal underwear for kids profitable to sell on Amazon United States?
- The niche generates $249K/yr across 74 tracked products. 0 of 13 products launched in the last 360 days are still selling. 90-day search growth is -87.7%. Flapen's verdict: Skip it (45/100).
- How competitive is the thermal underwear for kids niche?
- 30 brands and 79 sellers compete. The top 5 products take 30% of clicks and top 5 brands hold 58% of demand.
- What do buyers complain about in thermal underwear for kids?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Material Quality. The return rate is 7.9% — above our launch gate.
- When does demand for thermal underwear for kids peak?
- Demand peaks in Jan–Feb–Oct–Nov–Dec; the busiest month runs 28.7× the quietest.
- What does it cost to enter the thermal underwear for kids niche?
- Listings span $12.12–$62.37; the average listing price is $21.61 (sweet spot $15–$100). The average incumbent carries 1,145 reviews — the moat a new listing must climb.