SafeRest
King
Waterproof Mattress Protector, King
4.6 (280,612 ratings — across all sizes of this protector)
The protector that made our name, cut for the 76 by 80 inch King surface two people actually share.
Twin XL
SafeRest Waterproof Mattress Protector Twin XL Size
4.5 (3,600 ratings — across all sizes of this protector)
Twin XL beds take institutional punishment — move-in day, four years of occupants, or an adjustable base that folds the mattress in half every evening. The Essential Twin XL is the plain answer: an absorbent, breathable, noiseless fitted layer that blocks spills and sweat, fits profiles up to 18 inches, and costs little enough to replace without thought at the end of a lease.
$22.99
Price checked 2026-10-16
In stock
Your order is placed with and fulfilled by our retail partner — with its delivery network, tracking and return window.
Three layers of thinking
1
Barely-there build
Slim and quiet by design. There is no padding to compress unevenly on an adjustable frame and nothing that can crackle when the base lifts the head of the bed.
2
Full waterproof coverage
Everything a shared or borrowed bed absorbs stops at the barrier. The mattress underneath stays clean enough to hand over at the end of the term without a conversation about it.
3
Smooth 18-inch fit
Deep stretch pockets keep the cover tight across the long narrow surface, so it stays flat instead of migrating into a ridge at the foot of the bed.
The night test
The adjustable-base test is motion: raise and lower the bed a dozen times, then look for pulled corners or wrinkles. A protector that still lies flat after that will still be flat in a year.
Care
Machine wash cold and tumble dry low. The slim build dries in one cycle, so the bed is never out of service while the laundry finishes. Full care guide →
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Queen
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