Neoprene Placemats - Rectangle by J.H. Smith Company. $12.99. Set of 4 - one each red, lime, orange, and teal. 18" x 13". Bright color on one side with solid black color on back. 100% neoprene with a nylon fabric exterior. Made of the same, durable material as wetsuits, they're guaranteed to stand up to poolside splashes and over flowing drinks. Thanks to their neon color, they're fun to use whether you're entertaining or dining outdoors with the family. Perfect for outdoor dining.