Up to -25% Free Shipping & Extended Holiday Returns

Core Pillow Covers

Zips Over Any Pillow

Product Description

Experience space-like comfort with our Pillow Covers, featuring Outlast® fabric for cool, adaptive sleep. Revolutionize your night's sleep today!

Product Comparison

Features & Benefits

- Proprietary Outlast® lining fabric for maximum heat management and added comfort

- Zippered enclosure transforms your existing pillows into performance "cooling" pillows

- Designed to work even when used underneath your pillowcase

- OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: 05.0.9235

Materials

- 300 thread count 40% Outlast® viscose / 60% cotton outer fabric

- 100% polyester non-woven lining fabric with Outlast® Technology coating

Size Guide

Standard - 21” x 29”
King - 21” x 37”

Care Instructions

Basic Care:
Machine wash cold water on a gentle cycle with a mild detergent and with like colors only. Tumble dry low heat until completely dry. Remove from the dryer immediately. Only use non-chlorine bleach when needed. Do not dry clean. Do not iron.

Pro Tip:
Pillow covers should be washed every 2 weeks. Do not iron, bleach or dry clean your pillow covers.

Free Shipping, Extended Holiday Returns, & Price Matches

Free Shipping: All U.S. orders are shipped right to your door, free of charge. Orders are typically shipped within 24 business hours.

Extended Holiday Risk Free Trial: Sleep on it, wash it, and really put it to the test until February 28th, 2026! If you don’t love your new bedding, just return it for a full refund. No questions asked!

Price Matches: Buy any Slumber Cloud item now. If it goes on a deeper sale within the next 60 days, just let us know and we'll refund the difference.

*Final Sale items and colors are not eligible for return, exchange, or the 60 Night Trial Period.

Core Pillow Covers

On Sale from $47.20

Why You'll Love It:

Like mini spacesuits for your pillows.

No More Flipping To The Cool Side

Stay cool all night with our dual-layer Outlast® fabric pillow covers, perfect for hot sleepers to maintain optimal comfort.

Zippered Enclosure

Transform your pillows into "cooling" pillows effortlessly with our NASA-engineered cover for temperature control.

Protect Your Pillow

Extend your pillow's lifespan and simplify laundry with the Core Pillow Cover, adding an extra protective layer against wear and tear.

A better night’s sleep because of science.

It’s a fabric designed for NASA spacesuits up where temperatures change by 500 degrees. We think it can handle your bedroom.

How it works

The Only NASA Bedding

Our bedding utilizes Outlast®, the world’s only textile technology to have received the Certified Space Technology™ quality mark by the renowned Space Foundation.

Reduces Sweat By 50%

Our bedding provides proactive heat and moisture management, clinically proven to reduce night sweats by up to 50%.

Read the Outlast Humidity Sleep Study

Improves Deep Sleep By 20%

Our bedding adapts to the ideal temperature of both hot and cold sleepers, proven to decrease tossing & turning and increase sleep efficiency by 20%.

Read The Outlast Heat Sleep Study

"The quality of these covers is amazing! What my husband and I love most is they keep your pillow cool all night long!The quality of these covers is amazing! What my husband and I love most is they keep your pillow cool all night long!"

- Jolene C.

"Loved these. Elegant feel with a comfortable coolness to lull you to sleep."

- Eileen B.

Compare Our Products

Find the perfect solution for your needs

Core Pillow Covers

Outlast® + Cooling Cotton

Cooling Cotton

Durable

Structured, outer cover paired with a lining fabric.

Performance Pillow Covers

Outlast® + TENCEL™ lyocell

Dual Technologies

Moisture-Wicking

Airy, one layer of Outlast® coated lyocell.

	Core Pillow Covers	Performance Pillow Covers
Quantity How many are included	Choose from 1, 2, or 4 packs	2 pillow covers per pack
Zippered Enclosure	Yes	Yes
Technology	2 layers of Outlast® technology	Outlast® technology + moisture-wicking lyocell

Our Products

Outlast® PCM Technology

Proactive temperature management

Balances fluctuations in temperature

Phase change Materials

Brands Like Buffy & Cozy Earth

Moisture-Wicking Fabrics

Reactive Cooling

Works after sweat is produced

Bamboo, Eucalyptus, & Lyocell

Brands Like Parachute & Boll & Branch

Traditional Fabrics

Traps Heat & Moisture

Can cause overheating

Variety of weaves & hand feel

	Us	Moisture-Wicking Fabrics	Traditional Fabrics
Prevents Sweat Build-Up	✓	—	—
Manages Hot & Cold Sleepers' Needs	✓	—	—
Cool To The Touch	Exceptional	Moderate	Poor

FAQs

Are these pillow covers or pillowcases?

Not to be confused with pillowcases, these pillow covers are traditionally used underneath your pillowcases to keep your head cool and extend the lifetime of your pillows.

Should I put a pillowcase over my pillow covers?

Yes, we want your bed to look nice and match the rest of your linens so we made sure the technology inside our pillow covers will still work even when used with a pillowcase.

How many degrees cooler will this keep me?

Slumber Cloud products are designed to help manage heat and humidity build up. It is not an air conditioner with a set temperature degree, but it will react to your temperature all night long to reduce heat build up and manage temperature swings.

Does this come with one or two pillow covers?

The Single Pack option comes with one pillow cover. The Two Pack comes with two pillow covers. That means one for you and one to share with your partner (or not share, we don’t judge).

Over 30,000 happy sleepers have spoken

We've helped over 30,000 sleepers unlock their best rest yet. See why customers and the press are calling our products a dream come true. Read all reviews

★ ★ ★ ★ ★

These sheets and duvet cover are so comfy and cozy! They really do keep me cooler at nights too; which I've been fighting with my entire life - I'm an overheater! I already recommended them to my best friend.

— Kristi M.

★ ★ ★ ★ ★

Perfect for California Summer! I love the lightweight and how well it regulates heat, so that we are not hot nor cold. It is perfection. I was hesitant because of the cost but glad that I decided to purchase it

— Esther B.

★ ★ ★ ★ ★

I have bought countless pillows, new bed, different positions, tried couch, bought new couch. Got this ultra cool pillow, so soft, literally feels like sleeping on a nice cool cloud. Slept the full night, first full night in over a year.

— Sagar J.