Sleep Tite by Malouf Hypoallergenic 100% Waterproof Mattress Protector- 15-Year Warranty

Amazon.com Price:  $14.99 (as of 18/10/2017 05:23 PST- Details)

Protects against all fluids and most allergens
100% Waterproof with a fitted sheet style design that fits up to 22″ mattresses
Sleep Tite Technology allows air passage but repels liquids ensuring a comfortable sleeping environment