The purpose of the test was to determine the suitability of the Armored Vehicle Crewmens Uniform for use by the US Army in a natural humid tropic environment. The uniform was tested using personnel representative of those who would normally wear the uniform to perform their duties. Tests were conducted to determine functional suitability, maintainability, and durability. During the test, test participants related their appraisal of the test uniform to the standard field uniform. Recorders from the US Army Tropic Test Center made observations and administered questionnaires to collect data for this test. During the test one deficiency and three shortcomings were found. The deficiency was unsuitability for use in humid tropic environment due to lack of troop acceptance. The first two shortcomings involved failures of slide fasteners on the drop seat and breast pocket. The third shortcoming consisted of seam separations at the breast pocket and adjustable waist. It is concluded that the test uniform is unsuitable for use in the humid tropic environment based on troop acceptance. No definite conclusions were formulated concerning comfort and durability due to the wide latitude of participant response, lack of control uniform, and statistically small sample size. It is recommended that the test item not be adopted for Army use unless definite advantages are determined in the areas of comfort and durability through additional testing.