Waterproof Covers For Plaster Casts How Do You Get Dressed With A 3/4 Arm Cast?

How do you get dressed with a 3/4 arm cast? - waterproof covers for plaster casts

I'm wearing a cast (no plaster and out), which covers the arm EMOVE except fingers and half of my biceps. How do I make each day without changing clothes?
PS The summer is where I am.