What is RET & MVTR?Updated 2 months ago

RET (Resistance to Evaporating Heat Transfer) and MVTR (Moisture Vapor Transmission Rate) are both methods used to measure breathability, but they measure it in different ways. MVTR indicates how much water vapor can pass through a fabric in a given time, with higher values indicating greater breathability. RET, on the other hand, measures the fabric's resistance to heat transfer, with lower values indicating better breathability.