Personnel involved in emergency response and hazardous waste site activities often have the need to reach on-scene decisions regarding the effectiveness and limitations of chemical protective clothing. Three gravimetric techniques were evaluated as means for providing essential information for aiding such decisions. For four neat chemicals, three two-component solutions, and two clothing materials, permeation cup tests yielded breakthrough time and permeation rate data comparable to that from testing performed according to ASTM Test Method for Resistance of Protective Clothing Materials to Permeation by Liquids and Gases (F 739-85). Three prototype kits based on the cup test are presently undergoing field trials. The permeation cup test was selected over a simple immersion test and a proposed degradation test. Recommendations for further development of the cup test and the degradation test are given.