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.

For Hot Sleepers — Yuki Sleep

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 Cool

Why 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.

50% more

moisture wicking than cotton. Lyocell's open, nanofibrillar structure pulls moisture away from skin and releases it to the air — instead of holding it.

3× faster

moisture release. Where cotton holds water and gets clammy, lyocell transfers it through the fiber and evaporates it, keeping the surface dry.

Natural thermoregulation

The fiber's open structure allows continuous airflow. It adapts: cooler when you're warm, warmer when you cool down. No coatings, no gimmicks.

Zero PFAS

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.

Most Popular

Kumo

$199.95 / 4-piece set

Our most popular cooling set

  • 100% Lyocell from FSC eucalyptus
  • Fitted sheet, flat sheet, 2 pillowcases
  • Cool, silky hand-feel — lighter weight
Shop Kumo
Premium

Yume

$249.95 / 4-piece set

The premium choice

  • 100% Lyocell, sateen weave finish
  • Fitted sheet, flat sheet, 2 pillowcases
  • Denser drape with the same cooling performance
Shop Yume

Signs You're a Hot Sleeper

Sound familiar?

You wake up with damp sheets or pajamas
You kick off the covers at 3 a.m. — then pull them back at 5
You flip your pillow looking for the cold side
Your partner has mentioned you radiate heat
You wake up thirsty, even if the room is cool
If you checked even two of these, your bedding is likely working against you — not with you.
30-Night Trial
Free Returns
PFAS-Free Tested
OEKO-TEX 100
FSC Eucalyptus

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 Sets

Questions

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

Still need a hand?

Message us and a real person replies within 24 hours, Mon–Fri.

Help centre

Instant answers

Sizing, delivery, care and returns — answered.

Read the FAQ

Care guide

2-minute read

How to wash and keep lyocell cool and quiet, wash after wash.

Open the care guide

Send a message

We read every message and reply within 24 hours, Mon–Fri.

GOTS CertifiedOEKO-TEX® 100European Flax®FSC™ EucalyptusClimate Neutral