underdog glasses
Skip itA small market ($54K/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$30.32avg listing price — sweet spot $15–$100
Quality gap
Great4.0★avg incumbent rating — lower means beatable quality
Price range
Great$12.93–$69.76cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good713.95avg incumbent reviews — the moat a new listing must climb
Growth
Good+35.9%90-day search growth — must beat 0% to launch
Competition
Okay57%top-5 click share — leaders hold, buyers still browse
Returns
Okay4.4%return rate — above 5% kills the launch gate
Conversion
Bad1.8%search→purchase rate — share of searches ending in a sale
Brand share
Bad94%top-5 brand share — brand-locked demand
Market size
Bad$54K$54K/yr · 96K searches
According to Flapen's Amazon United States niche tracking, underdog glasses is a $54K/yr Amazon United States market (96K searches/yr). The top 5 brands hold 94% of demand. Verdict: Skip it — 47/100.
Data updated Jul 12, 2026 · scored weekly · How we score niches
underdog glasses market data
- Units sold / yr
- 2K–3K
- avg 0–100/product
- Revenue / yr
- $61K–$76K
- units × avg price
- Conversion rate
- 1.8%
- Avg BSR
- #710
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 2.9%
- Avg brand age
- 48 months
- Avg seller age
- 178 days
Competition & brand share
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.Brands
7 falling
Sellers
9
Top-5 brand share
94%
Top 20: 100%
Top-5 click share
57%
Top 20: 100%
Open market
2%
- DEECOZY37%
- FEISEDY33%
- UNDERDOG11%
- POCONT8%
- MEETSUN4%
- KIDENEI4%
- Open — no brand owns it (1 brand, 2%)
Demand
Weekly Amazon search volume, last 12 weeks — +35.9% search growth over the last 90 days.Top underdog glasses search terms
- underdog glasses50K/yr
- underdog sunglasses clip to hat12K/yr
- clip on hat sunglasses6K/yr
- underdog sunglasses15K/yr
- hat sunglasses5K/yr
- clip to cap sunglasses4K/yr
- underdog glasses for men4K/yr
Top underdog glasses 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 19 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
FEISEDY Polarized Clip On Sunglasses Clip Cap Sports Sunglass UV400 Protection for Mens Womens Fishing Cycling Hiking B0356
FEISEDY$22.134.5★42 rev
DEECOZY Outdoor Polarized Sunglasses Clip Cap Sports Sunglasses UV400 Sunglasses for Mens Womens Fishing Cycling Hiking
DEECOZY$14.813.9★121 rev
DEECOZY Outdoor Polarized Clip-On Sunglasses Flip Cover UV400 Protection Sunglasses for Adults Green
DEECOZY$13.633.9★121 rev
FEISEDY Polarized Clip On Sunglasses Clip Cap Sports Sunglasses UV400 Sunglasses for Mens Womens Fishing Cycling Hiking B0356
FEISEDY$25.384.5★42 rev
POCONT Clip Cap Sports Sunglasses Polarized Clip on Sunglasses Outdoor Polarized Clip Cap Glasses for Golf Cycling Fishing for Men Women (Green)
POCONT$15.713.5★140 rev
Newest
by launch dateFEISEDY Polarized Clip On Sunglasses Clip Cap Sports Sunglasses UV400 Sunglasses for Mens Womens Fishing Cycling Hiking B0356
FEISEDY$25.3842 rev
UNDERDOG Oliver Non-Polarized Hat Clip Sunglasses Lens Square-Curved Shield Screen-Ready Clarity for Displays Cap-Brim Clip UV400 Polycarbonate RX-Compatible Wraparound Fit Rose Gold
UNDERDOG$68.5533 rev
UNDERDOG Oliver Non-Polarized Hat Clip Sunglasses Lens Square-Curved Shield Screen-Ready Clarity for Displays Cap-Brim Clip UV400 Polycarbonate RX-Compatible Wraparound Fit Black Cherry
UNDERDOG$68.8733 rev
UNDERDOG Rudy Polarized Hat Clip-On Sunglasses Cap Clip Lens Square Frame HD Clarity All-Day Fit Glare-Reducing Shades for Fishing Boating Driving Golf and Outdoor Use Black Cherry
UNDERDOG$69.7613 rev
UNDERDOG Rocky Hat Clip-On Sunglasses Polarized Shield Lens Shades for Cap Brim UV400 Lens Lightweight Glare Reduction for Golfing Running Hiking and Outdoors Slim Fit Green
UNDERDOG$69.5936 rev
Trending
90-day click momentumUNDERDOG Rudy Polarized Hat Clip-On Sunglasses Cap Clip Lens Square Frame HD Clarity All-Day Fit Glare-Reducing Shades for Fishing Boating Driving Golf and Outdoor Use Black Cherry
UNDERDOG$69.764.5★
UNDERDOG Oliver Non-Polarized Hat Clip Sunglasses Lens Square-Curved Shield Screen-Ready Clarity for Displays Cap-Brim Clip UV400 Polycarbonate RX-Compatible Wraparound Fit Rose Gold
UNDERDOG$68.554.1★
UNDERDOG Oliver Non-Polarized Hat Clip Sunglasses Lens Square-Curved Shield Screen-Ready Clarity for Displays Cap-Brim Clip UV400 Polycarbonate RX-Compatible Wraparound Fit Black Cherry
UNDERDOG$68.874.1★
UNDERDOG Rocky Hat Clip-On Sunglasses Polarized Shield Lens Shades for Cap Brim UV400 Lens Lightweight Glare Reduction for Golfing Running Hiking and Outdoors Slim Fit Green
UNDERDOG$69.594.1★
FEISEDY Polarized Clip On Sunglasses Clip Cap Sports Sunglasses UV400 Sunglasses for Mens Womens Fishing Cycling Hiking B0356
FEISEDY$25.384.5★
What buyers say about underdog glasses
What buyers praise and complain about, mined from review topics.What buyers love
“Great fit”
“The clarity is excellent”
“Easy to use”
“Worth it”
“As advertised”
“I find them comfortable”
“a clean modern look”
“-They are super light so they dont weight down the brim of your cap”
“Work great at my job keep them down when there's no customers”
“Love the different color options”
What buyers complain about
“A tad too big”
“Did not function how I imagined, seemed cheesy and cheap”
“However, they feel cheap”
“Definitely not worth the high price”
“A bit flimsy”
“A little difficult to use”
“Wont fold up all the way”
“No instructions on how to swap lenses without damaging them”
“Poorly made and easily break”
“Doesn't fit all caps due to its inability to expand”
Top return reasons
Common questions
- Is underdog glasses profitable to sell on Amazon United States?
- The niche generates $54K/yr across 19 tracked products. 3 of 8 products launched in the last 360 days are still selling. 90-day search growth is +35.9%. Flapen's verdict: Skip it (47/100).
- How competitive is the underdog glasses niche?
- 7 brands and 9 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 94% of demand.
- What do buyers complain about in underdog glasses?
- Top complaints mined from reviews: Size-Overall, Functionality-Overall, Quality-Overall. The return rate is 4.4%.
- What does it cost to enter the underdog glasses niche?
- Listings span $12.93–$69.76; the average listing price is $30.32 (sweet spot $15–$100). The average incumbent carries 714 reviews — the moat a new listing must climb.