I found a hot weather t-shirt at campmor-the varitec plus. I was working on my 544 under the summer sun in Immokalee and discovered poly t's at the local thrift. One from Officer Jagger of the Kansas State Police but in black. A great cool T! I searched for new one's in bright colors but was never sure I had the same Kansas Patrol weave. After accumulating several varitec's in eye busting orange and yellow, I bought one in grey so as to blend in when necessary finding the dyeing process is the key-the grey campmor varitec plus is the same cool weave as the Jagger Kansas T, the yellows and oranges are not.