How to wash a sap cap?

[Muaguana]

Despite searching the interwebs, I haven't found any information on how to properly wash one of these: http://www.amazon.com/Night-Watchman.../dp/B001O5NT26

What makes me apprehensive about machine washing it is the impact material in the pouch. I'm not sure what it is or how it will react with laundry detergent, if at all. Does anyone else own one of these, and if so, how do you wash it? I used to just spray Febreeze on the inside of the rim, but I figure it's probably better to actually clean it for once.

[bongomania]

Huh! Back when I used to be into this sort of stuff, 20 years ago more or less, it was illegal to buy any sort of sap items (gloves etc) by mail unless you were law enforcement. Now I guess anyone can buy them off Amazon!

I'd email the manufacturer for cleaning directions.