Do Not Use for at Least 3 Days after Opening

The product says to wait at least 24 hours after opening and "flattening" - which entails using books to hold the corners flat. I waited two days, but sadly, the very first time I used it my chair created 'divots" (for lack of a better term) which negatively impact the "rolling" feature. I need to replace this product - but with something that is made of a stronger material.

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