The Ultimate Guide to Flannel Sheets
Flannel sheets are the coziest bedding you can own — brushed cotton that traps warmth for cold nights. This guide covers what flannel actually is, how to pick a good set (it's about GSM, not thread count), how to care for them, and our top-rated flannel sheets for 2026.
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Comparing sheet types? See our Percale vs. Sateen vs. Flannel guide and our Best Bed Sheets of 2026.
What are flannel sheets?
Flannel sheets are made from a soft woven fabric — almost always cotton — that has been brushed (napped) to raise a fuzzy pile on the surface. That brushing is the whole point: it traps air and body heat, which is what makes flannel so warm and soft. Quality flannel is brushed on both sides.
What to look for (it's about GSM, not thread count)
Flannel isn't measured in thread count — it's measured in GSM (grams per square meter), which tells you how heavy and warm the fabric is. Aim for 170 GSM or higher for a substantial, cozy set. Also look for 100% cotton, double-brushed fabric for extra softness, anti-pilling treatment so it doesn't get fuzzy-bally over time, and deep pockets to fit your mattress.
Our top flannel sheet picks for 2026
Best overall — Eddie Bauer 100% Cotton Flannel Sheet Set. Warm, touchably soft, and treated to resist pilling and wrinkles — the reliable, do-it-all winner.
Best heavyweight (coziest) — Mellanni 100% Cotton Heavyweight Flannel Sheet Set. Thick, luxuriously warm double-brushed cotton for the coldest nights.
Best value — Bare Home 100% Cotton Flannel Sheet Set. Velvety, double-brushed, deep-pocket flannel at a friendly price — a longtime bestseller.
Best patterns / style — Laura Ashley Cotton Flannel Sheet Set. Soft brushed cotton in the classic prints Laura Ashley is known for.
Best organic — Bare Home 100% Organic Cotton Flannel Sheet Set. GOTS-friendly organic cotton for anyone who wants eco-conscious, chemical-light bedding.
Shop our own range in the Flannel Sheets collection.
How to wash & soften flannel sheets
Wash flannel in cold or warm water on a gentle cycle with a mild detergent — skip bleach, and tumble dry on low to prevent shrinking and keep the nap soft. To soften a stiff set (or a brand-new one), add a cup of white vinegar to the rinse cycle; it strips detergent residue without coating the fibers. Avoid liquid fabric softener, which builds up on flannel and flattens the fuzz. Flannel may shed a little lint in its first few washes — that settles down.
Frequently asked questions
Is flannel considered 100% cotton?
Not always. "Flannel" refers to the brushed finish, not the fiber — it can be made from cotton, wool, or synthetic blends. Most flannel bed sheets are 100% cotton, which is what you want for softness and breathability, but always check the label, since some budget sets are cotton-polyester blends.
What do Americans call flannels?
In the U.S., "a flannel" usually means a flannel shirt — the soft plaid button-up. (In the UK, confusingly, "a flannel" is a washcloth.) When it comes to bedding, "flannel sheets" means brushed-cotton sheets in every country.
What makes a flannel a flannel?
The brushing (napping) process — not a fiber or a pattern. Flannel is any soft woven fabric that's been brushed to raise a fuzzy pile that traps warmth. Plaid is a pattern often printed on flannel, but plaid isn't what makes fabric flannel; the brushed nap is.
Is flannel hotter than cotton?
Yes — flannel sleeps warmer than standard cotton sheets like percale or sateen. It's usually made of cotton too, but the brushed nap traps body heat and reduces airflow, so it feels hotter. That makes flannel ideal for winter and cold sleepers, and too warm for summer or hot sleepers.
Also from Goza Towels
Build the perfect cold-weather bed, all with free US shipping:
- Flannel Sheets — our cozy brushed-cotton sets
- Percale vs. Sateen vs. Flannel — which weave is right for you
- Best Bed Sheets of 2026 — top picks across every material
- Bed Sheets & Bedding — shop the full range
Last reviewed: July 2026.