Will a standard king pillow fit this case?

Yes. This pillowcase measures 20 inches by 36 inches (51 cm by 91 cm), which fits standard king pillows. The invisible zipper closure keeps the pillow fully enclosed once inserted.

What makes silk better for preventing sleep creases?

Silk creates less friction against skin than cotton or linen, which reduces the pressure marks that form when your face presses into the fabric overnight. In user studies, more than 95% of participants reported fewer and less noticeable sleep creases after switching to this pillowcase.

Is this pillowcase safe for sensitive skin?

Yes. The Slipsilk fabric used here has been laboratory tested and cleared as hypoallergenic, making it suitable for people with sensitive skin or allergies.

Can you feel the zipper when you sleep on it?

The zipper is sewn to sit flush along the seam with no visible hardware or bulk, so it should not be noticeable during sleep. It is designed to stay closed and keep the pillow secure without adding pressure points.

White King Zippered Pillowcase

machine washable
hypoallergenic

The 3-second version

Mulberry silk construction tested and cleared as hypoallergenic
Invisible zipper keeps pillow fully enclosed overnight
King dimensions fit standard 20 x 36 inch pillows
Requires following care instructions for washing
King size only—check pillow dimensions first
White shows stains more readily than darker colors

Why it's on GiftsFeed

Silk Pillowcase with Invisible Zipper in White, King Size

Most pillowcases treat the pillow as cargo that will shift but mostly stay put. Envelope closures let pillows creep out by morning, and open-end cases bunch and slide. The invisible zipper here solves the wandering-pillow problem without adding bulk or a visible seam you can feel through the fabric. If you have switched to silk for the friction benefits but still wake up with your pillow half-exposed, the difference is the closure.

Good gift when

People who wake with visible pressure lines on their face
Anyone concerned about hair breakage from overnight friction
Sleepers who prefer pillowcases that stay securely in place
Those with sensitive skin seeking hypoallergenic bedding

Skip it if Only available in king size and white—if you need queen dimensions or a different color, this will not work.

Specs

Material: Slipsilk mulberry silk
Size: King (20" x 36" / 51 cm x 91 cm)
Closure: Invisible zipper
Color: White
Care: Machine washable (see care instructions)
Hypoallergenic: Laboratory tested
Included: 1 pillowcase

What's included

1 white king pillowcase with invisible zipper
Care instructions

If you're giving it

No sizing to guess

Ships in product packaging; consider a gift box or wrap if presenting.

The details

This pillowcase is cut from Slipsilk, a mulberry silk weave that has been laboratory tested and cleared as hypoallergenic. The king dimensions measure 20 inches by 36 inches (51 cm by 91 cm), fitting standard king pillows. An invisible zipper runs along one edge to keep the pillow fully enclosed, preventing it from working its way out during the night.

Silk's smooth surface creates less friction against skin and hair than cotton or linen. In user studies conducted by the brand, more than 95% of participants reported fewer and less noticeable sleep creases, lines, and wrinkles after switching to this pillowcase. Dermatologists and hairstylists have recommended silk pillowcases for clients concerned about overnight pressure marks and hair breakage.

The white fabric is machine washable when you follow the care instructions included with the product. The zipper closure is sewn to sit flush, so there is no visible hardware or bulk along the seam. This is the king size; a queen version is also available if you need a smaller fit.

Slip

White King Zippered Pillowcase

Dermatologist-recommended mulberry silk that stays put all night

$147at slip.com

Quantity

Buy from Slip

Ships and sold by Slip. About this merchant

The 3-second version

Mulberry silk construction tested and cleared as hypoallergenic
Invisible zipper keeps pillow fully enclosed overnight
King dimensions fit standard 20 x 36 inch pillows
Requires following care instructions for washing
King size only—check pillow dimensions first
White shows stains more readily than darker colors

Cheaper alternatives

Questions

Will a standard king pillow fit this case?: Yes. This pillowcase measures 20 inches by 36 inches (51 cm by 91 cm), which fits standard king pillows. The invisible zipper closure keeps the pillow fully enclosed once inserted.
Can I put this in the washing machine?: Yes, this pillowcase is machine washable. Follow the care instructions included with the product to maintain the silk fabric properly over time.
What makes silk better for preventing sleep creases?: Silk creates less friction against skin than cotton or linen, which reduces the pressure marks that form when your face presses into the fabric overnight. In user studies, more than 95% of participants reported fewer and less noticeable sleep creases after switching to this pillowcase.
Is this pillowcase safe for sensitive skin?: Yes. The Slipsilk fabric used here has been laboratory tested and cleared as hypoallergenic, making it suitable for people with sensitive skin or allergies.
Can you feel the zipper when you sleep on it?: The zipper is sewn to sit flush along the seam with no visible hardware or bulk, so it should not be noticeable during sleep. It is designed to stay closed and keep the pillow secure without adding pressure points.