Large Cal King. the cover is durable; The sides appear to be made of very weak material. The elastic at the corners appears to be much stronger than what we typically see on sheets. The retailer is quick to respond and seems determined to honor their warranty. The only thing to remember is that the warranty is only valid as long as the distributor stays in business. The price corresponds to the value. There is some debate among reviewers about the water resistance of the case. I believe the barrier is some kind of plastic so gently wash and air dry or on very low heat and it should work fine. (because you can't heat up your goretext raincoat!). The surface has been described as terry (loop) but actually looks more like a very small loop terry that is unnoticeable even through a thin sheet.
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