Although cotton has many natural advantages, its use for military tent fabrics has declined, primarily because of the heaviness of the fabrics, which is dictated by the strength requirements. Indeed, many 100% cotton fabrics treated with modern flame-resistant finishes fail to meet the high performance standards required by the military. In this work we produced stronger, more durable fabrics from predominantly-cotton yarns containing extra high strength Dyneema^® polyethylene fibers. Fabrics woven from these intimately blended yarns were treated with a flame resistant finish. Because the fabrics contained mostly cotton, softness, absorbency, breathability, and other desirable properties of all cotton were preserved.