Polyester outer layer/fleece innernBreathable and Waterproof by using the same DWR coating as on the Polytherm fabric.n4-way stretch for easy, unrestricted mobility and comfort - even under dry wear.nThe Performance Cut and flat seam construction fits comfortably without irritationnBright Stylish Colors.nA new series of an intermediate garments below the LavaCore Polytherm level of performance, but more warmth than a traditional Lycra Rash Guard.An updated version of a traditional Lycra rash guard. Rather than a tight stretch fit, these tops fit and feel like a comfortable tee shirt.