I've had a set for years and used to wear them under my Draggin jeans during hot weather. Very good quality but I never had to 'field test' them. Finally got First HT Air because of the 'dressing time' and inability to take them off at long stops on a ride (not very comfortable to sit in a chair). So I don't use them any more. But I still use the Bohn shirt under my Draggin shirt for rides to and from the office in really hot weather. The armor is great (a bit bulky), but as he states, provides no abrasive protection. The shirt ventilates very well and I will probably take the shirt armor to wear under my Stich when I go to Ireland next year so I can use the Draggin Shirt if the temps get really warm. Hope that helps.