This part of ISO 17491 specifies a test method for determining the resistance of protective clothing against penetration by a jet of liquid. This part of ISO 17491 is applicable to clothing with liquid-tight connections between different parts of the clothing and, if applicable, between the clothing and other items of personal protective equipment worn with it. This part of ISO 17491 does not address chemical permeation resistance of the clothing materials, which is specified in other standards.