This product is heavy duty enough, so that if you spray your shirt or T-shirt it will become water proof. Of course water will still come down your neck, so your torso will get wet. But ever wonder why the Armed Forces Drill Instructors never sweated? Well they spray this on the inside of their uniforms and the perspiration runs down the inside of their uniforms, and the recruits do not realize the D.I. is not a god; impervious to weather and physical laws.
Rating: [5 of 5 Stars!]