this report describes investigations of reactive materials suitable for incorporation in or on fabrics for protection from percutaneous chemical warfare agents. microencapsulated forms of alkali metal hydroxides and aliphatic amines were developed and found to be unsuitable for protection from hd. aqueous solutions of aliphatic amines containing 4-(n,n-dimethylamino) pyridine were found to destroy gb on contact. microcapsules comprising granules of stabilized xxcc3 in ethyl cellulose walls were found to react readily with hd. these microcapsules were bonded to 8-oz sateen fabric with resin binders, and the permeation of hd vapor through the fabric was determined. at contamination densities of 2.4 gm/sq m the hd vapor penetration was found to be 6 micrograms/sq cm. the treated fabrics were tested for stability toward washing and ultraviolet irradiation, and no change in agent vapor penetration was observed for either the washed samples or those subjected to irradiation for the equivalent of 1800 hours of sunlight. (author)