Is Dyneema machine-washable?

I have machine washed both my ULA and Golite pack a few times with no problems.

Thanks!

Do it in cold as warm soapy water will speed up the breakdown of the PU coating, if it has one. Line dry of course.

Yeah, avoid most store detergents (woolite being a "gentle" detergent is the biggest marketing scheme of the 21st century). I'd suggest atsko sport wash: http://www.amazon.com/Atsko-Sport-Wash-Bottle-wash/dp/B001DLF6C2
It's cheap, and safe to use on everything outdoorsy and rinses clean so it won't gunk up your synthetic fabrics or prematurely wear them down. I also like to throw my technical stuff in a mesh laundry bag to provide another layer of protection against the the laundry machines agitator. If you have a front load washer, you don't need the mesh bag.

I hand wash packs and other bags in a laundry tub with lukewarm water and a detergent that has no additives like brighteners and perfumes. I try to minimize wet time and rinse well, then let them drip dry, usually upside down, so all the pockets empty and dry. Toweling them after a 15-20 minute drip will speed the drying time. I might switch a pack to right side up drying after hanging overnight— sometimes there are places that don't vent we'll upside down.