Works fine -- does the job. Could be thicker material but since it will be under a bottom sheet and I may possibly also put on a padded mattress cover, this works fine as a barrier for all types of allergens - which is the whole point of getting it.
While I ordered two XL Twin - I received two full mattress pads. The pads fit loosely, but it is okay, as they stay in place and all seems well. I would recommend them. Our Collie Puppy decided to go on the bed and pee (no idea why); but these mattress pads protected our mattress; and washed up nicely.
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