Does it actually feel cool to sleep on?

The top fabric is designed to feel cooler than standard cotton or vinyl-backed protectors. Reviews are split: some sleepers notice the difference, others find it close to a normal protector.

Will it fit a deep mattress?

It is made to stretch over the mattress like a fitted sheet. Owners of thick pillow-top or extra-deep mattresses often report a tight fit, so check your mattress depth before buying.

Is it fully waterproof?

It is water resistant, not a sealed waterproof cover. It handles spills and sweat, but standing liquid left on it for a long time can seep through.

How should I wash it?

Machine wash it on a cool or warm cycle and tumble dry low. Hot water and high heat are what reviewers blame for wearing out the water-resistant backing.

Does it change how the mattress feels?

It adds a thin, soft layer with little padding. You keep the mattress's own feel rather than gaining cushioning.

Is it worth it over a basic protector?

If you want quiet, breathable protection instead of a crinkly plastic cover, it is a reasonable step up. If you mainly want maximum waterproofing or extra padding, a heavier protector suits better.