“What is the care on this mattress pad? What temperature water? Does it amply fit a 15" deep mattress, with plenty of tuck-under, or will it tend to come loose? Are the sides flimsy, or do then seem substantial, like they would hold up well for a long time? Often this is the part that wears out first on a mattress pad.”
This item is machine washable. It should fit a 15" deep mattress well, but not too much tuck-under. The item does not seem flimsy to me.