I bought several of these for my husband who works outside to protect his arms from the sun.  He is sensitive to all sun-screen products and needed an alternative to protect him from sunburn.  He loves these shirts.  The fabric really does breath and keep him cool in the 90+ degree heat.  He gets dirt and grease all over them and it washes right out.  Just a little pre-treatment, wash in warm water, throw in the dryer.  Wonderful!