コットンマットレスプロテクター

It fits perfectly and the pure cotton fill makes it feel like an extra layer of comforter rather than a plastic-y protector. Washed it twice already with zero shrinkage.

The box quilting with pure cotton stuffing adds just enough padding without making the bed feel bulky, and it washes up like new each time.

I was worried this would feel stuffy, but the pure cotton and quilted top make it surprisingly light and breathable. It's been through several washes already and still looks and feels like new.