JML Twin Waterproof Mattress Protector,Quilted Fitted Mattress Pad fits up to 16" Deep - Walmart.com
HomeRoots Cherry 8' Dual Comfort Nylon Twin XL Waterproof Mattress in the Mattresses department at Lowes.com
Registry Deluxe Quilted Waterproof Fitted Mattress Pad, Twin XL, 39" x 80", Fits Up To 16" Matresses, White | Waterproof Mattress Pads | Mattress Pads | Bed and Bath Linens | Open