These appear to have been around for some time. I found one locally at a gearswap (passed as it looked a little too worn for comfort).
They're listed for $99.98 at Campmor.
Can anyone speak to their quality?
I don't mind the fact they're 18-19 ounces really – the extra 60 grams between a new Trekker in Regular, and the EXT isn't a dealbreaker.
Is there any durability concerns with these being first generation Neoair designs, and made with a nylon shell, rather than the current polyester?

