We do not recommend that you place any of our footwear in the washing machine. Any footwear that is damaged when washed in a washing machine is not defective and can not be covered by SCARS.
We do recommend taking the insoles out and cleaning the shoes with a hose and soapy water then letting them air dry. Taking the insoles out and washing separately will help them dry quicker.
For leather MACV Boots, we recommend using KIWI Leather or if you have a favorite leather protectant then go with that. You can checkout the full set here: http://www.kiwicare.com/m/cms/us/products/leather/leather-care-kit.html
For Suede MACV Boots, KIWI products has a few suede care options including brushes, erasers, and protectants. You can view these items on their website here: https://www.kiwicare.com/en-us/products/kiwi-suede-and-nubuck-boot-and-shoe-care-kit