I was fortunate to buy a Tom Bihn Brain Bag when they were, for a short time, making it in 420 Denier High-Tenacity Parapack with a Ballistic bottom. Parapack

I was fortunate to buy a Tom Bihn Brain Bag when they were, for a short time, making it in 420 Denier High-Tenacity Parapack with a Ballistic bottom. Parapack is a tough and lightweight parachute nylon common in the 1960s, but now is very rare, especially for a backpack. It's very different from ripstop etc., smooth like silk but strong. I used to wear out laptop backpacks about once a year. This bag has lasted me ten years so far and it still looks nearly new. https://www.tombihn.com/blogs/main/parapack https://www.tombihn.com/blogs/main/parapack