Baby Luxe 5242DLXSTAN-BOX Features: -242 Heat tempered, heavy duty 6 gauge steel coils. -Heat tempered 6 gauge border rods for extra strength and support. -Flex-edge clips for the ultimate in mattress side edge support. -Flex-o-lator wire steel mesh prevents loss of cushioning material support layer for unsurpassed durability. -Blended cotton batting for unsurpassed comfort specially treated anti-bacterial. -Non-toxic, tear and water resistant, triple laminate cover. -Air vents help to keep mattress fresh cloth binding. -And also helps prevent edge seams from splitting meets all federal and state flammability standards.