Good call. Nobody can tell you that ATGATT is the most comfortable way to ride on a hot day, but I've lost several good riding friends over the course of the years and seen too many really UGLY injuries from riding without appropriate gear. I can't bring myself to roll out of the driveway unless I'm in full armor. The night of my accident, I was only riding 5-6 miles on urban side streets to visit a friend, but I still wore the full monty of protection and although I was wearing jeans, I always wear the hard ABS MX knee/shin guards underneath. Sometime between the initial hit and the hard stop at the end, my knee dug into the street hard enough to completely wear through the jeans fabric and grate the kneed guard into shredded bits, but I didn't have one cubic inch of rash or bruise anywhere on my body.
Pics when I get home.