YUKI
For Hot Sleepers
Quiet by design. The detail behind the bedding — how it's made, how to care for it, and how to reach us.
You're Not a Bad Sleeper.
Your Bedding Is.
Heat. Moisture. Synthetic materials that trap your body's warmth instead of releasing it. If you wake up hot, it's not you — it's what you're sleeping on.
Find Your CoolWhy You Overheat
Most bedding is designed to look good on a shelf. Not to regulate temperature while you sleep. Here's what's actually happening.
Polyester traps heat
Synthetic fibers have a closed structure. They insulate body heat instead of venting it — like sleeping under plastic wrap.
Cotton absorbs but doesn't release
Cotton soaks up moisture — then holds it. You end up sleeping in damp fabric that clings and chills as the night goes on.
PFAS coatings seal you in
"Wrinkle-free" and "stain-resistant" finishes often use PFAS chemicals that coat fibers and block airflow entirely.
Thread count is a distraction
High thread counts pack fibers tighter, reducing breathability. The material matters more than the number on the label.
Why Lyocell Works
Lyocell is made from FSC-certified eucalyptus wood pulp in a closed-loop process. Its fiber structure is fundamentally different from cotton or polyester.
moisture wicking than cotton. Lyocell's open, nanofibrillar structure pulls moisture away from skin and releases it to the air — instead of holding it.
moisture release. Where cotton holds water and gets clammy, lyocell transfers it through the fiber and evaporates it, keeping the surface dry.
The fiber's open structure allows continuous airflow. It adapts: cooler when you're warm, warmer when you cool down. No coatings, no gimmicks.
No chemical finishes blocking airflow. Every Yuki set is independently tested PFAS-free — the softness and performance come from the fiber itself.
What We Recommend
Two sets, both 100% Lyocell. The difference is weight and finish — pick the feel you prefer.
Kumo
Our most popular cooling set
- 100% Lyocell from FSC eucalyptus
- Fitted sheet, flat sheet, 2 pillowcases
- Cool, silky hand-feel — lighter weight
Yume
The premium choice
- 100% Lyocell, sateen weave finish
- Fitted sheet, flat sheet, 2 pillowcases
- Denser drape with the same cooling performance
Signs You're a Hot Sleeper
Sound familiar?
Questions About Hot Sleeping
If your current sheets are polyester, poly-blend, or chemically treated cotton, yes — the material change alone makes a measurable difference. Lyocell wicks 50% more moisture than cotton and doesn't trap heat the way synthetics do. It won't override a room that's 30°C, but for the majority of hot sleepers, bedding is the biggest variable they haven't changed.
AC cools the room, not the microclimate between your body and the sheet. If your bedding traps moisture and heat at skin level, a cool room helps less than you'd expect. Many customers report turning their AC up a few degrees after switching — the sheets handle what AC can't reach.
Memory foam retains more heat than innerspring or latex — so what you put on top matters even more. Lyocell sheets won't change the mattress, but they create a breathable layer between you and the foam. It's the most impactful single change you can make without replacing the mattress.
Percale is the most breathable cotton weave, and it's better than sateen cotton for heat. But cotton fibers still absorb and hold moisture — up to 25x their weight. Lyocell absorbs moisture then releases it through the fiber. You stay dry, not damp. If you've tried cotton percale and still overheat, the fiber is the issue, not the weave.
Yes. Every set comes with a 30-night trial. Sleep on them, wash them, live with them. If you're still overheating, return them for free — no questions, no restocking fee. We'd rather you find what works.
Silk feels cool to the touch and breathes well, but it absorbs less moisture than lyocell, requires dry cleaning, and degrades with washing. A quality silk set runs $400–800+. Lyocell matches or exceeds silk's cooling properties, is machine washable, gets softer with every wash, and costs a fraction of the price.
Sleep cool tonight.
Shop Bedding SetsQuestions
A few things to know.
Orders placed before 4pm ship the same business day. Delivery takes 2–4 business days, free on every order. Everything arrives plastic-free — a paper box and a cotton bag.
Sleep on it for 30 nights. If it doesn't sleep cooler and calmer than the plastic you had, send it back — free returns, full refund. Washed bedding included.
Machine wash cool on a gentle cycle and skip the softener — lyocell softens on its own, wash after wash. Line dry or tumble low. No ironing needed.
A silk-soft fibre spun from FSC-certified eucalyptus in a closed loop that recovers about 99% of its solvent. It wicks roughly 50% more moisture than cotton, so it sleeps cool and dry. OEKO-TEX® 100 certified, plastic-free to the packaging.
YUKI — Contact
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