The Gregory Baltoro 65 is a great pack, with a decent amount of room, and a very thought out design. The Gregory Baltoro 65 is made of 210D DDR and 210D x 420D HD flat weave fabrics, and are extremely durable and weatherproof to a degree. Using this pack the last year, I have some up's and down's for this pack, mostly positive things. First, lets talk about the functionality of this pack. It is on the heavy side, weighing 5lbs 10oz's, but it carries it well with the great sus