100% Waterproof King Size Mattress Topper Pillow Top Pad - Deep Pocket

In this review of the 100% Waterproof King Size Mattress Topper from Primesoft, the bottom line is simple: this is a comfortable, practical topper for sleepers who want a soft pillow-top feel plus real waterproof protection. The reviewer found the blended fabric and down alternative fill create a noticeably softer surface without feeling hot, and the waterproof layer handled a spill without saturating the mattress. It suits owners of deep mattresses who need a secure fit and a breathable, easy-care cover that adds cushioning without a mattress replacement.

Key Features

• Premium material combination: A 70% rayon fiber and 30% polyester fabric cover feels soft and breathable against the skin while the 100% down alternative fill provides cushioning similar to a pillow top.
• Waterproof protection: The topper resists liquid penetration so a small spill will not reach the mattress, helping preserve mattress hygiene.
• Breathability: The construction permits airflow so the surface stays cooler and drier than many heavy toppers.
• Deep pocket fit: The elasticized skirt fits 8 to 35 in thick mattresses, providing a snug hold on very deep beds.
• Easy care: Machine washable and safe for low temperature tumble drying, making maintenance straightforward.
• Stylish quilting: A wavy thread sewing design gives the topper an elegant look while keeping the fill evenly distributed.

Who It's For

This topper is ideal for people who want to add cushioning and a pillow-top feel to an existing mattress without losing waterproof protection. It works well for couples, parents of young children, and anyone who worries about spills or mattress stains but does not want a thick, heat-trapping pad.

It is less well suited for sleepers who need very firm orthopedic support or who prefer a high-loft memory foam topper for deep contouring; those shoppers should consider a specialized support or foam layer instead.

Pros & Cons

Pros

• Soft, breathable cover that feels comfortable against the skin.
• Effective waterproof barrier that protects the mattress from spills.
• Deep pocket design fits very thick mattresses securely.
• Machine washable for easy cleaning and upkeep.

Cons

• Provides a pillow-top softness rather than firm orthopedic support, so not ideal if firm support is required.

Specifications

Product type	Mattress topper / pad
Size	King size
Cover fabric	70% rayon fiber, 30% polyester
Filling	100% down alternative
Water resistance	Waterproof layer, protects against spills up to 1L
Fit	Fits mattresses 8 to 35 in thick
Care	Machine wash, low temperature tumble dry (30 C)

Our Verdict

The Primesoft king size waterproof mattress topper is a solid value for anyone seeking a soft, breathable pillow-top layer with reliable waterproof protection and a secure deep-pocket fit. It adds comfort and spill resistance without major heat buildup and is easy to maintain, making it a smart choice for families, light sleepers, and owners of deep mattresses.

Frequently Asked Questions

Will this topper fit very deep mattresses?
Yes, the elastic skirt is designed to fit mattresses from 8 to 35 in thick so it works on most very deep beds.

Is the topper machine washable?
Yes, the topper supports machine washing and low temperature tumble drying at 30 C for easy cleaning.

Does the waterproof feature make the surface hot?
The fabric blend and construction emphasize breathability so the topper remains cooler than many heavy waterproof pads, though it provides a pillow-top softness rather than a firm cooling layer.