I love my leather jackets. Since they are old, I don't want to spend too much money dry cleaning them so every summer I wash them myself.
Warning: This can ruin the leather or the insulation material inside. It will discolor the leather. It really did not matter to me so I went ahead and washed them.
Make sure it's a nice sunny day when you wash your jackets.
Set your washer to gentle cycle and add detergent.
Step 1: Start Running the Machine
Let the washer run through the whole cycle and spin dry the jacket.
Step 2: Take Out of the Washer
After it has spined dried the jacket, take out of washer and place on a heavy duty hanger.
Step 3: Let the Sun Do Its Thing
Hang outside to dry, it takes a few hours to dry completely. Half way through, pull jacket inside out to help dry the inside.
I you feel like it, once it's dried run some leather conditioning to preserve the leather.
Put away your clean jacket and its ready for next winter.