Thickest elastic, no similar product comes close * Keeps bottom sheets on all mattresses, even hospital beds, hide-a-beds, adjustable beds, inclining beds, baby"s cribs and odd shaped mattresses such as those found in boats and RV"s * Strong suspender clips * 4 straps, one used diagonally for each corner of the bed * Higher quality/longer life than shock cord (bungee) type cross corner products