This mattress pad (double/full size) fits well on the Douglas Futon Lounger which I also bought from Wayfair. The waterproof coating gives it a slight crinkling sound and I would have liked the top to have thicker padding but so far it works well enough. I haven't had any spills on it yet so I don't know how well the waterproofing works. EDIT: After only three washes (following the care instructions), the waterproof coating has several noticeable holes in it. I would not recommend this product.