Saddle Style Waterproof Mattress Pad & Sheet Protector – 34 x 36 inches – Absorbs 6 Cups

Amazon.com Price: $16.95 (as of 18/10/2017 12:50 PST- Details)

Soft, comfortable cotton top
100% Waterproof + Machine Washable
Absorbs up to 6 cups of fluid (more than an adult bladder)