Brandwave

REI Co-op vs Therm-a-Rest:Which is more popular?

In September 2026, REI Co-op had more branded searches than Therm-a-Rest among sleeping mat brands worldwide. REI Co-op had about 74,000 branded searches, while Therm-a-Rest had 33,100. REI Co-op made up 31.3% of all sleeping mat brand searches we track, and Therm-a-Rest accounted for 14%. When we asked ChatGPT and Google AI Overviews about sleeping mat brands, Therm-a-Rest appeared in all five answers and REI Co-op in three. Therm-a-Rest was mentioned before REI Co-op in every answer.

Among sleeping mat brands worldwide in September 2026

Who do people search for more?

REI Co-op, about 2 searches for every 1 for Therm-a-Rest

REI Co-op 74K searchesTherm-a-Rest 33.1K searches

Who does AI mention more?

Therm-a-Rest, mentioned in every answer we collected

Therm-a-Rest in 5 of 5REI Co-op in 3 of 5

Who does AI recommend more?

Therm-a-Rest, named ahead of REI Co-op in every answer

Therm-a-Rest first in 5REI Co-op never first

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Top sleeping mat brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Therm-a-Rest appeared in all five answers. REI Co-op was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. Therm-a-Rest was listed before REI Co-op in every answer.

Most recommended by AI

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

  1. Therm-a-Rest1st
  2. Nemo2nd
  3. Exped3rd
  4. Sea to Summit4th
  5. Klymit5th
  6. REI Co-op6th

Mentioned by AI

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

  • Exped5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Therm-a-Rest5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Nemo5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • REI Co-op3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Sea to Summit3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Klymit3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers

See every answer about sleeping mat brands

5 answers

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 Therm-a-Rest more popular in search?

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

REI Co-op and Therm-a-Rest among sleeping mat brands worldwide, by month

Share of searches by month for REI Co-op, Therm-a-Rest. The figures are in the table below the chart.

View monthly share of searches table
MonthREI Co-opSea to SummitExpedTherm-a-RestNemoKlymit
Oct 202533.8%27.6%18.5%15.1%3.1%2%
Nov 202539.8%26.8%14.7%14.7%2.5%1.6%
Dec 202544.5%24.5%13.4%13.4%2.5%1.8%
Jan 202635.2%28.8%15.8%15.8%2.7%1.7%
Feb 202634%27.8%18.6%15.2%2.7%1.7%
Mar 202633.8%27.7%18.5%15.1%3.2%1.6%
Apr 202630.6%30.6%16.7%16.7%3.5%1.8%
May 202630.4%30.4%16.6%16.6%4.1%1.8%
Jun 202626.5%32.4%17.7%17.7%3.7%1.9%
Jul 202624.6%36.6%16.5%16.5%4%1.8%
Aug 202628.5%34.7%15.6%15.6%3.9%1.7%
Sep 202631.3%31.3%17.2%14%4.3%1.9%

How has the REI Co-op and Therm-a-Rest comparison changed over the last 12 months?

3 findings
  • REI Co-op was ahead of Therm-a-Rest in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, REI Co-op’s share of searches among sleeping mat brands worldwide moved from 33.8% to 31.3%, and its estimated monthly branded searches held steady at 74K.
  • Across the 12 months ending September 2026, Therm-a-Rest’s share of searches among sleeping mat brands worldwide moved from 15.1% to 14%, and its estimated monthly branded searches held steady at 33.1K.

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

2 changes

  1. In September 2026, REI Co-op overtook Sea to Summit to become the leader among sleeping mat brands worldwide, with 31.3% of the searches.

  2. In September 2026, Therm-a-Rest lost share of searches among sleeping mat brands worldwide, from 15.6% to 14%.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using REI Co-op’s and Therm-a-Rest’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

Therm-a-Rest

1 branded search term

  • therm-a-rest

How the Brand Demand Index is measured

Other head-to-heads among sleeping mat brands

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