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SafeRest
Box Spring Encasement, Twin XL
Twin XL · box spring

SafeRest Premium 9" Thick Box Spring Encasement - Waterproof - Breathable, Noiseless and Vinyl Free - Fits Up to 9" - TwinXL

New to the catalog

Everyone protects the mattress; almost no one protects the box spring under it. Yet the foundation has more seams, more hollow space and more undisturbed corners than the mattress ever will — which is exactly what pests and dust settle into. This Twin XL encasement closes that gap, and Twin XL is no accident: it is the size on nearly every dorm and adjustable-base bed in the country.

$34.75
Price checked 2026-08-09

In stock

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Three layers of thinking

1

Six-sided foundation cover

Durable polyester panels wrap the box spring completely — top, bottom, sides. The hollow frame that used to be open real estate becomes a sealed box nothing can move into.

2

Micro-zipper seal

The zipper teeth are small enough to bar even early-stage bed bugs. A closure flap secures the zipper pull at the end of its run, so the seal cannot creep open as the foundation flexes.

3

Waterproof working surface

Foundations meet spills too — a knocked-over bottle runs off the mattress edge and lands here. The waterproof layer keeps the wood and fabric below dry, which keeps the whole bed free of the musty smell old box springs develop.

The night test

You never touch the box spring, so the only nightly evidence is negative: no scratching sounds from the frame, no dust bloom when you drop onto the bed, no mystery odor from under the mattress. Sealed foundations are simply quiet.

Care

Install once and forget it — the encasement lives under the mattress and out of the laundry cycle. If it ever needs cleaning, a cold machine wash and low tumble dry bring it back; zip it shut before it goes in. Full care guide →

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