Casper Waterproof Mattress Protector review

Casper's Waterproof Mattress Protector is a straightforward fitted cover from a large mattress brand. The top is polyester with a thermoplastic polyurethane layer that keeps the mattress dry, and Casper stresses that the materials are quiet and crinkle-free. Active stretch skirting made of polyester and spandex fits any mattress up to 18 inches deep, and the size chart covers twin through California king. During Casper's Black Friday sale a twin cost $98.10 and a queen $107.10, against list prices of $109 and $119, with free shipping and dispatch in 1 to 2 business days. Casper asks buyers to wash cold and dry low, warning that hot drying can cause delamination and shrinkage. The weak spot is the warranty. The protector carries a 1-year limited warranty, and returns are accepted within 30 days only if it is unused and in its original packaging. Buyers who want long coverage get more from SafeRest or Linenspa for far less.

Who it is for

Casper owners and anyone who wants a mattress-brand protector they can also see in a store.

Price

From $98.10 for a twin on sale when checked; queen $107.10.

Select your size: Twin Sale price $98.10
Quoted from the vendor pricing page on November 10, 2026.

Key features

• Waterproof top of polyester with thermoplastic polyurethane
• Quiet, crinkle-free materials
• Active stretch skirting of polyester and spandex for mattresses up to 18 inches
• Machine wash cold and tumble dry low
• Free shipping, 30-day returns if unused, 1-year limited protector warranty

Strengths and weaknesses

• Strength: Fits deep mattresses up to 18 inches in every size
• Strength: Ships in 1 to 2 business days
• Strength: Sold in Casper stores as well as online
• Weakness: Only a 1-year limited warranty, against 10 years at SafeRest and Linenspa
• Weakness: Returns require the protector to be unused and in its original packaging
• Weakness: More than twice the price of SafeRest even on sale

Key facts

• Price: From $98.10 (twin, sale)
• Queen: $107.10 (list $119)
• Fits: Mattresses up to 18 in
• Warranty: 1 year limited

Where it ranks

Casper Waterproof Mattress Protector is No. 5 in our Best Mattress Protectors verdict and No. 6 in Best Waterproof Mattress Protectors.