# GRT California King Rayon Bamboo Waterproof Mattress Protector

The GRT Rayon bamboo Waterproof Mattress Protector is a California King fitted cover with a rayon-from-bamboo and polyester surface, a waterproof claim, and a deep-pocket fit. Its listed pocket range is unusually broad, while customer feedback is divided on both water resistance and cooling, so those are important expectations to weigh.

- [Original product page](https://best-deals.pro/product/grt-california-king-rayon-bamboo-waterproof-mattress-protector)
- [View offer](https://best-deals.pro/visit/grt-california-king-rayon-bamboo-waterproof-mattress-protector)
- Market: US
- Language: en-US
- Currency: USD
- Brand: GRT
- Model: GRT Rayon bamboo Waterproof Mattress Protector
- Category: Home & Kitchen > Home Textiles > Bedding
- Price: 31.97 USD
- Previous price: 39.99 USD
- Discount: 20%
- Price checked: 2026-11-14T06:31:38.696Z
- Rating: 4.5 / 5
- Reviews: 1886

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Fitted, stretchy skirt is claimed to fit mattresses from 8 to 26 inches deep.
- Surface is listed as 60% polyester and 40% rayon made from bamboo.
- The listing describes a double waterproof membrane and a quiet 3D air fabric surface.
- Machine washing is specified. Tumble drying is advised on low temperature in the feature description.

## Pros

- The wide stated pocket range may suit California King mattresses with greater depth than standard fitted covers accommodate.
- Machine-wash care is specified, and the fabric surface includes rayon made from bamboo.

## Specifications

### Identity and fit
- Brand: GRT
- Model: GRT Rayon bamboo Waterproof Mattress Protector
- Size: California King
- Pocket fit claim: 8"- 26" mattresses
- Closure: Pull On
- Color: White
### Materials and protection
- Surface material: Surface: 60% Polyester + 40% Rayon Made from Bamboo
- Water resistance listed: Waterproof
- Listed features: Breathable, Cooling, Stain Protection, Washable, Water Proof
- Thread count: 500
### Care
- Care instructions: Machine Wash

## Before you buy

- Customer reports are mixed on whether the cover reliably resists water and whether it feels cooling. Treat those outcomes as uncertain for your needs rather than guaranteed by the listing.

## A good fit for

- California King owners seeking a fitted protector with a stated 8-to-26-inch mattress-depth range.
- Buyers who want a machine-washable cover with a polyester and bamboo-rayon surface.

## Less suited to

- Shoppers who require consistently confirmed spill protection or a reliably cooling feel, given the mixed customer feedback.

## Customer feedback

Customer feedback highlights positive impressions of fit, softness, comfort, and protection from spills, but reports on water resistance and cooling are mixed. That matters because the protector is listed as waterproof and cooling, yet those performance claims do not settle the differing customer experiences. Aggregate ratings lean positive overall, but cannot explain why individual customers rated it as they did.
- Positive themes: Customers praise the fit on larger beds and say the cover stays in place.
- Positive themes: Softness, comfort, and protection from spills are also reported strengths.
- Mixed feedback: Customers disagree about whether it is waterproof, with some reporting strong protection and others saying it does not resist water.
- Mixed feedback: Cooling impressions differ, from cool to the touch to not very cooling.

## Frequently asked questions

### What mattress sizes is this protector listed for?
The stated size is California King. Its stretchy fitted skirt is claimed to fit mattresses from 8 to 26 inches deep.
### What is the surface made from?
The listed surface is 60% polyester and 40% rayon made from bamboo.
### Can it be machine washed?
Yes. The care field says Machine Wash. The feature description also advises tumble drying at low temperature.
### How dependable is its water resistance?
The listing labels it waterproof, but customer feedback includes both positive and negative experiences with water resistance. The supplied information does not establish a consistent result.

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## Add-ons

- [CGK Extra Deep Cal King Sheet Set - 6pc Warm & Cozy Sheets - Antique White \| Hotel Luxury Winter Bedding for Women, Men, Kids & Teens, Fits 18 to 24 Inch Mattresses, All Around Elastic, Holiday Gifts](https://best-deals.pro/visit/grt-california-king-rayon-bamboo-waterproof-mattress-protector)

## Images

![GRT California King Rayon Bamboo Waterproof Mattress Protector — 1](https://best-deals.pro/i/5XqlSKJovEJ0hs9QxP0bsIjdYtxWsdsHob9bCtqrDTQ4tx9S4zDNp0x2eD_TNnyFYXdpWr0IbXbrya3i9v_FPzMaR6kP9zeoaWqioh5os9tNAo7A_tdbzWS8.jpg)

![GRT California King Rayon Bamboo Waterproof Mattress Protector — 2](https://best-deals.pro/i/k5Au_PQa6_zihV6awSrovlq3iRTjRs8LRCuoy_e--06e7kuLjm7s4wBuFkpi3XjRw4G1ymQG8Z_tqbgaxBTRLJDTeA11cjv6QXQPjCsNRepMDzDi98ZKLpDC.jpg)

![GRT California King Rayon Bamboo Waterproof Mattress Protector — 3](https://best-deals.pro/i/FobbEO_ea07HvPZiqgc8-2QQDb7tzAWWpLw6xI3N5jnMVUBNotyMb-aWQazm0DDJOs0nCVym3acqYg4rgyOmkAJ-_UIJTsCyaQIuSNxVT1i-CEzz2RznpSXn.jpg)

![GRT California King Rayon Bamboo Waterproof Mattress Protector — 4](https://best-deals.pro/i/3fMrnfgGYNbiYi8h3OOGGDrlWMR8PKnLu7VrqX8asILE2HxRN1xachhz6MKF8zjRwXV6-8sDQNNNcH8Zs4ngosJDaSpE4_ci6-z-o3Lehd2cLr0OT3-eqS8N.jpg)

![GRT California King Rayon Bamboo Waterproof Mattress Protector — 5](https://best-deals.pro/i/5-g3MURX1rEz6byGWHq7QNJeaTYSSxRG4GDIxH4EW0Y49cRZZmMI63XRVJsu5OTu3BSWg-EuPfe0XlgB0HJ0TImDP7LS9Z1WXYfWgM6GRQjxiQO2ZT_nWCMx.jpg)

![GRT California King Rayon Bamboo Waterproof Mattress Protector — 6](https://best-deals.pro/i/w0nTOyuqGcOvPSDLs0pxqktw0KuU8Os4qMbh6E4DHc1GCeLtroffKTDFnWOee6xUw38mweJVabRWtOtHg-5zHxHmCMOcMWo1t3k7sPizVvOUT7dzQDpdiKpe.jpg)