Cooling bed sheets compared: Cozy Earth bamboo, Boll & Branch, Brooklinen and Parachute

Which cooling bed sheets should you buy?

No maker of these four sets backs its cooling language with a test. Cozy Earth calls its bamboo viscose temperature-regulating, Parachute calls percale cool to the touch, and Boll & Branch calls its cotton sateen breathable, each without citing a study or lab result^{1, 3, 12}. So choose on fabric you like, mattress depth and what happens if you send them back.

Choose Parachute Percale if you want a crisp percale weave, which Parachute describes as lightweight and cool to the touch. A Pebble Queen is $269, and the catch is an expired OEKO-TEX certificate number and an $8 mail return^{6, 12–14}. Choose Brooklinen Luxe Sateen Core if you want the lowest Queen price: $209 for cotton sateen, with returns open for 365 days minus a $9.95 fee^{8, 9}.

Choose Boll & Branch Signature Hemmed if you want a valid OEKO-TEX certificate and free returns inside 100 days. A Bay Garden Queen is $319 and a White Queen is $279, and the sheets carry no published warranty^3–6. Choose Cozy Earth Bamboo Sheet Set if your mattress is deep or you want a long warranty: the pocket is 18 inches, stretching to 20, and the warranty runs 10 years. A solid Queen is $324, and Cozy Earth shows no certificate number^{1, 2}.

Cozy Earth, Boll & Branch, Brooklinen and Parachute sheets side by side

Prices are US list prices on each maker’s page, before tax, with no sale showing when checked. Brooklinen’s page was recorded on a Twin, so its Queen price comes from the store listing. Specs, terms and cooling language are the makers’ own. We found no independent test of any of these sets, and none of the cooling rows is a measurement.

These links go to each brand’s own store and earn us no commission.

Which sheets fit which need

Each suits a different need, and this isn’t a ranking. Start with your mattress depth, then check the return terms.

• You want a crisp, light weave: Parachute Percale. It’s $269 for a Pebble Queen, and Parachute calls percale cool to the touch^{12, 13}. The catch: its OEKO-TEX certificate shows as expired, mail returns cost $8 and it publishes no warranty^{6, 14, 15}.
• You want the lowest Queen price in cotton sateen: Brooklinen Luxe Sateen Core. A Queen is $209 and returns are open for up to 365 days^{8, 9}. The catch: a $9.95 fee comes out of every refund, the pocket is 16 in and no warranty terms are published^{7, 9, 10}.
• You want organic cotton and free returns: Boll & Branch Signature Hemmed. It’s $319 in Bay Garden, with a valid OEKO-TEX certificate and returns free within 100 days^{3, 4, 6}. The catch: no sheet warranty, and the terms ask for original condition and packaging^{4, 5}.
• You have a deep mattress or want a long warranty: Cozy Earth Bamboo Sheet Set. The pocket is 18 in, stretching to 20, and the warranty runs 10 years¹. The catch: $324 for a solid Queen, no certificate number, and final-sale colors lose the trial and the warranty^{1, 2}.

Sateen or percale for hot sleepers

Three of these sets are sateen and one is percale. Parachute describes its percale as lightweight, breathable and crisp, and as cool to the touch¹². Boll & Branch describes its sateen as smooth and breathable with a slight sheen, and Brooklinen gives its sateen a low-sheen finish^{3, 7}.

Those are descriptions of feel, not measurements. None of the makers cites a test of how warm the sheets sleep, and we found no independent test of these sets. So treat percale as the crisper feel the maker describes, not as a proven cooler sheet.

Cozy Earth’s bamboo viscose is the odd one out. Cozy Earth calls it temperature-regulating, breathable and moisture-wicking, and pitches it to hot sleepers, but the page cites no study or lab result¹.

OEKO-TEX certificates: valid, expired and missing

OEKO-TEX’s label check showed Boll & Branch’s certificate 18.HUS.40240 and Brooklinen’s 17.HUS.08214 as valid on October 21, 2026⁶. It showed Parachute’s 16.HUS.93300 as expired that day, and Parachute’s pages list no newer number^{6, 12}. Cozy Earth says its fabric is OEKO-TEX certified but shows no certificate number, so there’s nothing to look up¹.

The label covers testing for harmful substances. It says nothing about softness, durability or how warm the sheets feel. Certificates are issued for one year at a time, so check the number on OEKO-TEX’s label check before you buy⁶.

Returns and warranty if the sheets don’t suit you

Comfort is personal, so the return terms matter more than any cooling claim. Boll & Branch takes returns with free return shipping within 100 days, in original condition and packaging, though the original shipping and handling is not refunded^{3, 4}. Brooklinen allows up to 365 days but keeps $9.95 from every refund, and it doesn’t exchange sheets⁹. Parachute allows 60 days and charges $8 for a mail return, though store returns and store credit are free¹⁴.

Cozy Earth advertises a 100-day trial, but overstock and last-chance colors are final sale, and the color shown by default was one of them when checked¹. None of the four says whether washed sheets can go back. Only Cozy Earth publishes a sheet warranty: 10 years, with the final-sale exception^{1, 4, 10, 15}.

Cost per year

Sheets use no power and need no membership, so replacement is the running cost. Brooklinen’s care guide recommends replacing sheets every two years, which puts a $209 Queen at $104.50 a year^{8, 11}. Parachute gives no lifespan. Spreading a $269 Queen over three years, our assumption, gives $89.67 a year¹³.

Boll & Branch and Cozy Earth don’t say how long their sheets last, so their yearly cost is unknown, not zero^{1, 3}. None of these figures counts laundry. Read them as a way to compare, not a prediction of how long your set lasts.

Do cooling sheets help you sleep?

We found no trials showing that a particular sheet weave or fiber improves sleep. The one controlled study we found compared sleepwear and duvet fabrics at 17 and 22 °C in 17 healthy young adults, not sheets, and it was funded by Australian Wool Innovation¹⁶.

Our sleep evidence review goes through that study and the research on bed-temperature systems. If you want to control bed temperature instead of changing fabric, see the bed cooling comparison, or Eight Sleep alternatives for bed coolers with no required plan. To price sheets against those systems over three years, use the ownership cost page, and for how we choose products, read the sleep methodology.

Read the full reviews

Each review lists the sources, unknowns and trade-offs behind this page. The sleep buying guide shows where the sheets sit among the other bedding products.

• Cozy Earth Bamboo Sheet Set review
• Boll & Branch Signature Hemmed review
• Brooklinen Luxe Sateen Core review
• Parachute Percale review

Sources

1. Bamboo Sheet Set Cozy Earth · manufacturer
2. Bamboo Sheet Set listing on Cozy Earth's store (sizes, colors and prices) Cozy Earth · manufacturer · price read from the store’s product data
3. Signature Hemmed Sheet Set, Bay Garden / Queen Boll & Branch · manufacturer
4. Terms of Service (returns and refunds, warranties) Boll & Branch · manufacturer
5. Our Limited Mattress Warranty Boll & Branch · manufacturer
6. OEKO-TEX Label Check OEKO-TEX · certifier
7. Luxe Sateen Sheet Set Brooklinen · manufacturer
8. Luxe Sateen Core Sheet Set listing on Brooklinen's store (sizes, colors and prices) Brooklinen · manufacturer · price read from the store’s product data
9. Returns & Exchanges Brooklinen · manufacturer
10. Our Product Warranty Brooklinen · manufacturer
11. Care Guide Brooklinen · manufacturer
12. Percale Sheet Set - White K/CK Parachute · manufacturer
13. Percale Sheet Set - Pebble F/Q listing on Parachute's store (options and prices) Parachute · manufacturer · price read from the store’s product data
14. Refund policy Parachute · manufacturer
15. FAQ (returns, exchanges, damaged items, sizing, certifications) Parachute · manufacturer
16. The effects of fabric for sleepwear and bedding on sleep at ambient temperatures of 17°C and 22°C Nature and Science of Sleep (Shin M, Halaki M, Swan P, Ireland AH, Chow CM), 2016 · randomized trial