I suspect only a small number of people will find this interesting but for some reason Harvey Norman are pushing out Sony AKA-AF1 anti-fog sheets for $5 where RRP is $29 and next cheapest on Staticice is $19. Apparently reuseable up to 200 times each! (2 sheets in pack)
Looks like it'll fit all Sony action camera cases and I reckon you'd be able to stuff it into other action camera cases.
Great for people who are using swim/dive housings which are notorious for fogging up with temperature change.
Also if you just like things dry!
even at $5 they would be making a profit, how much would it cost to make two of these.. over priced accessories.
Good price compared to normal though.