Moisture promotes pressure ulcers.
For patients with pressure ulcers, the moisture content of the mattress is of great importance. The drier the mattress, the lower the risk of developing pressure ulcers. Therefore, a low RET value is an indicator of the Lascara® sheet's performance. The RET value indicates the fabric's resistance to water vapor. The lower the value, the better the breathability. Very good membranes have RET values of 0-6, less effective ones 6-13, and values of 13-20 are still acceptable. The Lascara® fabric was found to have an RET value of 3.43.