Prime Day Deal: The Extra-Deep Fitted Sheet That Fits Thick Mattresses Is 36% Off

Brit+Co Staff on June 23, 2026

If you’ve added a mattress topper or own a thick pillow-top, you know the nightly fight: the fitted sheet’s corners ping off the moment you move. CGK Unlimited’s extra-deep fitted sheet is the fix — it’s built to fit mattresses a full 18 to 24 inches deep and stay put. And for Prime Day, it’s 36% off.

The deal

For Prime Day — now through June 27, 2026 — this CGK Unlimited extra-deep queen fitted sheet is 36% off. It’s a Prime Day deal, so a Prime membership is required, and the price ends when the event closes on June 27 (or earlier if it sells out).

What it is

Important to know up front: this is a single fitted sheet only — not a full set — which is exactly why it’s handy. The deep pockets fit mattresses from 18 to 24 inches, with all-around elastic for a snug fit that won’t pop off, so it works over deep mattresses, pillow-tops, mattress-plus-topper combos, and even air mattresses. The fabric is the same hotel-luxury feel as CGK’s sets: ultra-soft, breathable, and wrinkle-, fade- and stain-resistant (and it won’t pill). This is the queen size in white.

How to use it

Measure your mattress depth first — including any topper — and confirm it lands in the 18-to-24-inch range so the pockets grip without bunching. Stretch the all-around elastic over each corner; it’s meant to stay put through the night. Care is simple: machine wash and tumble dry, no special cycle, and the wrinkle-resistant fabric goes back on smooth. Since it’s sold on its own, it’s also an easy way to replace just the fitted sheet that wore out before the rest of your set.

Who it’s for

It’s for anyone whose mattress has outgrown standard sheets — thick hybrids, pillow-tops, or a bed with a topper added — and for guest-room air mattresses that regular fitted sheets won’t cover. Because it’s a single sheet, it’s also the practical pick if you just need to replace a worn-out or stained fitted sheet without rebuying a whole set. If you want a complete set with flat sheet and pillowcases, CGK’s full sets are the better buy.

Frequently asked questions

When is the Prime Day deal?
The 36% discount runs during Amazon Prime Day, now through June 27, 2026. A Prime membership is required, and the price ends when the event closes (or earlier if it sells out).
Is this a full sheet set?
No — it’s a single fitted sheet only (queen, white). There’s no flat sheet or pillowcases. That’s intentional: it’s meant for deep mattresses or to replace just the fitted sheet.
How deep a mattress does it fit?
The extra-deep pockets fit mattresses from 18 to 24 inches deep, with all-around elastic for a snug, stay-put fit — including pillow-tops, mattress-plus-topper combos, and air mattresses.
Where can I buy it?
It’s available at Amazon — use the button above for the current listing and price.