Answer: Women's underwear
While wiping his face with a pair of women's underwear, Clark says "These stores can't get any hooter than they-- HOTTER than they are!" "Well, you do have your coat on." - Mary, the sales lady "Oh yes, how did that happen?" - Clark "Because it's cold out" - Mary "Yes, it is a bit nipply out. Haha, did I say nipple? Ah, there is a nip in the air though." - Clark