Bought these because I can't be bothered to get into the full leather kit every ride but I do want some protection that's better than ordinary jeans. Also the black Draggin jeans can be worn in the office so no need to change when I get to work.
The jeans don't offer any impact protection, only abrasion (the cargo pants have pockets for soft armour, I think). I don't know how much protection they offer as I haven't crashed (and hope not to, so may never know how effective they are).
On real hot days I wear Draggins (over shorts), a Heine Gericke mesh jacket, walking boots and gloves. Easy to take off the Draggins and carry them in your backpack.
I recently read that you need protection from your feet upwards. So feet first, then legs, then torso and obviously head. Not what I would expect, but apparently ankle injuries are very common. (Just remembered that Ted Simon in his recent book described getting trapped by his ankle when he fell off on a bad road).
Cheers
mc9