I have 2015 Gosamer Gear Mariposa plus ultralight backpack with hip belt for sale. Bought in 2015 never taken to trail siting in closet ever sence.Below is link for nice review  that shuld answer most of your questions about this model.

https://sectionhiker.com/gossamer-gear-mariposa-plus-backpack-review/

$185 shiped Pay Pal  Friends & Family

Thank you