Warm Sheets from 3 Sustainable Brands

As the weather turns cooler, it's time to swap your lightweight summer bedding for something warmer and cozier.

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Organic cotton flannel sheets provide exceptional warmth during cold months, trapping heat to keep you comfortable throughout winter nights. And they are sustainable as well!

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Here are some of the warmest, softest, and coziest sheets from sustainable brands that will keep you toasty:

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Flannel Sheet Set from Boll & Branch

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Handcrafted in Portugal from 100% organic cotton, Boll & Branch's Flannel Sheet Set is free of any harmful pesticides, GMOs, or toxins like formaldehyde. This flannel sheet is woven without any harsh chemicals, has the right balance of warmth and breathability, and comes in plastic-free packaging. Boll & Branch uses renewable energy for manufacturing its products and employs ethical labor practices throughout its supply chain.

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Cloud Brushed™ Organic Flannel Fitted Sheet from Coyuchi

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Coyuchi's sheet delivers exceptional warmth through repeatedly brushed flannel that improves over time. Made with GOTS-certified organic cotton (solid colors) or a recycled/organic cotton blend (striped), these Portuguese-crafted sheets use proprietary techniques and plant-based softeners. The brand prioritizes sustainability through responsible fiber sourcing, a takeback program, transparent emissions reporting with reduction targets, and reduced virgin plastic packaging.

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If you sleep hot throughout the year, the warm sheets from Boll & Branch and Coyuchi might not work for you. Instead, try this all-season sheet from Ettitude.

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Signature Bamboo Sheet from Ettitude

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Ettitude's Signature Bamboo Sheets are perfect for hot sleepers, offering year-round comfort with CleanBamboo® — a silky, breathable bamboo lyocell fabric. Made using a patented closed-loop process with food-grade solvents, these sheets are free from chemicals and plastics. They feel like 1,000-thread count cotton while remaining light and airy. Ettitude is OEKO-TEX, B Corp, and Climate Neutral certified, and uses bamboo from responsibly managed bamboo forests that don't impact panda habitats.

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