Simple hook to hang backpack on a standard oval clothes rack, for example in a closet.

I printed this in PLA and it is holding up fine, but I recommend PETG, because of its higher resistancy against creep.

only 16 (up to 28 in the biggest version) grams of filament

recommended for empty backpacks only, not designed for heavy loads, but according to some of you guys it can hold way more than that ;)