This waterproof ultra breathable fitted mattress protector guarantees maximum protection and with its evaporative resistance helps eliminate humidity that is normally generated during sleepwaterproof ultra breathable fitted mattress protector in 100 cotton flannelette 210gm2 with an ultra breathable elastomere membrane total ultra comfortable protection that allows humidity to evaporate whilst remaining totally waterproofthis elastomere membrane is 10 times more breathable than cla