Is it really that cold 11C in HK? May be colder by the ocean. I still in my tee and shorts when 11C. It was 7C this morning when I went out for a short run, still wearing the same. If below 5C but above 0C, I will switch to long sleeve and long pants. This was me when it was only -5C!!!!! Brrrrrrrrrrrrrrrrr.........