Outdoor shoes; footwear worn outside (as opposed to indoor shoes/slippers).
学校では外履きと上履きを必ず分けるように言われる。
At school you are always told to separate your outdoor shoes and indoor shoes.
雨の日は外履きが濡れるので替えを持っておくと便利だ。
On rainy days your outdoor shoes get wet, so it's handy to have a spare pair.
家に上がるときは外履きを脱いでください。
Please take off your outdoor shoes when you come into the house.