weight: 19.6/20/20.2 oz
volume: 32L; 37L (internal capacity)
sizes: 17”; 19”; 19" w/ long straps
sizing: roughly, 17" = small/medium, 19" = medium/large, 19" w/ long straps = extra large. long straps are ~2" longer above the strap pockets to fit taller/bigger hikers more comfo