Running

I agree but nowadays I like to keep my knees warm as I do suffer knee pain after running/cycling in cool weather sometimes... weather is pretty mild now though so it's not as bad

I've seen the road ID things before - was gonna get one for cycling

Just to add, I've one of these - don't use it for running but you might find it useful (attach key and wear snugly on wrist)

http://www.winstanleysbikes.co.uk/product/32347/Lizard_Skins_Key_Chain