Air Textile Pants from Dianese. Have armor on the hips and knees for great protection but made from fabric to breathe. Have a flap that zips and snaps open for ventilation as well as zipper to attach to your Dianese jacket to create a suit. Purchased a couple of years ago and worn once (over kill for my coffee shop and back riding) then hung up in the closet. Like new, no scratches or scuffs. Fantastic riding pants. 

For reference, I am 6' and 175 waist size 32 and these fit like a glove.