Someone brought up a velcro strap to hold the mask strap in place. Someone else brought up the issue of the stretch of it. Being also a skier, this is similar to the plastic holder for goggles, which in one end is permanently connected on the bottom and a snap button connection at the top. Something similar could be done for hoods. Metal isn't a good idea, but it could be a buckle at the top or something else, but anything that provides a strong attachment to the hood.
I btw, have lost one mask. It was stupid of me. Done diving and put my mask on my forehead. I was towed by my buddy with a DPV quite a long distance back, and I thought (key word "thought") it was so tight there that I would notice if it came loose. Not. When I take my mask off, now I pull it below my chin. Yes, rookie mistake. Did that after 12 dives or so.
There is a dive expo here in Seattle next month. I'll try to talk to some hood manufacturers about it.