Gads, looks like the "double layer to protect knees" got nuked along with several other knee threads.
At 35F, the PI Thermal Fleece tights fail to keep the whole leg warm esp on steep decents. So last week, I ordered $14 wool tights with feet (sort of panty hose but made of wool) After today's ride, that thin wool layer may not help much.
Unfortunately, the cookie jar is low from buying 2 pair (company paid for one pair as reward for commuting). Wondering how to add an extra layer across the whole leg without binding at the knee??