Microfiber fabric can vary so wildly that it's hard to say. For the price it's worth a shot I'd say. Some microfiber fabrics are prone to running tears more so than others but it should hold the load just fine at that weight fabric. Basically the only problem I could see would be easily detected early on if you're willing to possibly rip apart your new sheets.
--If a cow laughs hard, does milk come out its nose?