Brandwave

REI Co-op vs Sea to Summit:Which is more popular?

In September 2026, REI Co-op and Sea to Summit were level in searches among sleeping bag brands worldwide, with an estimated 74K branded searches each, at 7.5% of the total each. When we asked ChatGPT and Google AI Overviews about sleeping bag brands, REI Co-op appeared in four of the five answers and Sea to Summit in two. Sea to Summit was mentioned before REI Co-op in two out of three answers.

Among sleeping bag brands worldwide in September 2026

Who do people search for more?

REI Co-op and Sea to Summit are searched for about as often as each other.

REI Co-op 74K searchesSea to Summit 74K searches

Who does AI mention more?

REI Co-op, mentioned in 4 of 5 answers, Sea to Summit in 2

REI Co-op in 4 of 5Sea to Summit in 2 of 5

Who does AI recommend more?

Sea to Summit, named ahead of REI Co-op in 2 of 3 answers

Sea to Summit first in 2REI Co-op first in 1

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Top sleeping bag brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, REI Co-op was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Sea to Summit was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Sea to Summit was listed before REI Co-op in two out of three answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. REI Co-op1st
  2. Marmot2nd
  3. Sea to Summit3rd
  4. Nemo4th
  5. Western Mountaineering5th
  6. Forclaz6th
  7. Big Agnes7th
  8. Therm-a-Rest8th
  9. Exped9th
  10. Kathmandu–
  11. +1 more

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • REI Co-op4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Western Mountaineering3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Marmot3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Nemo3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Sea to Summit2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Forclaz2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Big Agnes2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Exped1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Therm-a-Rest1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Kathmandu0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

+1 more

See every answer about sleeping bag brands

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.

Is REI Co-op or Sea to Summit more popular in search?

This chart shows how often people search Google for REI Co-op and Sea to Summit by name. Each line represents a brand's share of searches for all 11 sleeping bag brands we track, month by month, from English-language searches worldwide.

REI Co-op and Sea to Summit among sleeping bag brands worldwide, by month

Share of searches by month for REI Co-op, Sea to Summit. The figures are in the table below the chart.

View monthly share of searches table
MonthKathmanduMacpacREI Co-opSea to SummitExpedForclazTherm-a-RestBig AgnesWestern MountaineeringMarmotNemo
Oct 202560.1%12.1%6.6%5.4%3.6%5.4%3%2.4%1.1%0.32%0.06%
Nov 202559%14.4%7.9%5.3%2.9%4.3%2.9%1.9%1.1%0.26%0.06%
Dec 202560.5%14.8%8.1%4.4%2.4%4.4%2.4%1.6%0.89%0.26%0.05%
Jan 202656.5%13.9%7.6%6.2%3.4%5.1%3.4%2.3%1.2%0.3%0.06%
Feb 202655.9%13.7%7.5%6.2%4.1%5%3.4%2.8%1%0.29%0.07%
Mar 202661.5%12.3%6.8%5.5%3.7%3.7%3%2.5%0.74%0.22%0.07%
Apr 202661%14.9%5.5%5.5%3%3.7%3%2.5%0.6%0.27%0.07%
May 202658.4%14.3%6.4%6.4%3.5%3.5%3.5%2.9%0.7%0.31%0.09%
Jun 202662.3%15.3%4.6%5.6%3.1%3.1%3.1%2.1%0.5%0.22%0.08%
Jul 202658.3%14.2%5.2%7.8%3.5%3.5%3.5%2.9%0.7%0.25%0.09%
Aug 202659.1%11.8%6.5%7.9%3.6%3.6%3.6%2.9%0.71%0.26%0.11%
Sep 202655.6%13.7%7.5%7.5%4.1%4.1%3.3%2.7%1%0.36%0.13%

How has the REI Co-op and Sea to Summit comparison changed over the last 12 months?

3 findings
  • The lead changed hands once in the 12 months ending September 2026: Sea to Summit took it in June 2026.
  • Across the 12 months ending September 2026, REI Co-op’s share of searches among sleeping bag brands worldwide moved from 6.6% to 7.5%, and its estimated monthly branded searches held steady at 74K.
  • Across the 12 months ending September 2026, Sea to Summit’s share of searches among sleeping bag brands worldwide moved from 5.4% to 7.5%, and its estimated monthly branded searches moved from 60.5K to 74K.

How did search popularity change for sleeping bag brands worldwide in September 2026?

2 changes

  1. In September 2026, REI Co-op overtook Sea to Summit to rank 3rd among sleeping bag brands worldwide, with 7.5% of the searches.

  2. Estimated monthly branded searches for Sea to Summit worldwide rose 22.3% over 12 measured months, from 60.5K to 74K in September 2026.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using REI Co-op’s and Sea to Summit’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

REI Co-op

1 branded search term

  • rei co-op

Sea to Summit

1 branded search term

  • sea to summit

How the Brand Demand Index is measured

Other head-to-heads among sleeping bag brands

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