AATCC 213-2022, Test Method for Vertical Wicking Rate of Textiles: to Specified Times, describes a procedure for measuring how quickly liquid water is drawn upward through a fabric. A specimen is suspended vertically with its lower end in contact with the test liquid and the time taken for the liquid front to reach marked heights is recorded, giving a wicking rate for the material. The method is used by textile laboratories and fabric developers comparing the moisture transport behavior of woven, knit and nonwoven structures.