Machine washing trail runners

Insoles, laces out. Air dry. Works for me for decades. Put a towel in there with them. Laces in a lingerie bag if you have one. Mild detergent plus a little borax if extra funky.

I have washed running shoes without incident for years. But, we bought a new front loader with some "ultra clean" cycle. I threw in my new Merrill's and the heel support melted. As it turns out the super clean cycle is super hot.

Someone has mentioned to me putting them in the freezer to kill bacteria – nice idea. Haven't done it yet.

I have done this for years also with no problems. You might want to have your machine set on extra rinse or run an extra rinse cycle. I washed a pair this summer, then I went walking around locally in the rain. My shoes started foaming up pretty profusely from the residual soap. I looked like I had marshmallows on my feet.