1、Package list: 2 large trays (6.3" x 3.15")+2 small trays (3.15" x 3.15"); Non-slip mat*16; Manual*1; Sandpaper*1; Color White.2、Made from natural Diatom mud and plant fiber, small holes within diatomite enable it have amazing water absorption. They could absorb water and gets dry in a few minutes. It makes the Bathroom/Sink Counter top more dry and tidy.3、Non-slip footpads boost the slip-resistance of coasters while keeping them out of the bathroom vanity. This design improves the contact surface between the diatomaceous earth coaster and the air, accelerate moisture evaporation, and prolongs the service life of the product.4、Suitable to be used as absorbent mats for soaps / cups / soap bottle / dish sponge / make-up bottles, and anywhere you need to absorb water quickly and keep the table / countertop surface dry.5、Easy to clean, just need to wash with running water and wipe with a wet sponge, then dry naturally. If you have any issues or comments, please don't hesitate to reach out to us.