I wanted to buy a new backpack. I like one particular one (mainly due to the price) but the problem is i do not know that will i be able to tie my sleeping bag or sleeping mat to its bottom. I know most of you would say that the sleeping bag should be stuffed inside the bag and i normally do that with my bigger backpack. Its just better to have an option (with a 50-55L bag) to tie something outside specially if you have a bag, a mat and a tent. I will attach a picture so you guys know if it is possible to attach something to this one.