content: This is a shapeless sack with pockets. Absolutely no thought has gone into design. When you are carrying 40 lbs on you, distribution of weight becomes critical, else you are likely to end up with a major case of backache. Having used the vest a few times and each time spending the following day in bed, I can vouch that the manufacturer has spent no effort in designing the product. I have an Altius (20 lbs). What a wonderful vest!