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things have grown more complex. after I tried to load my full overnight gear it just didnt work, so i added this contraption at the bottom. it does essential what straps do on a pack but instead of pulling forward from the top it pushes back from the bottom to keep the load in line with your hips. that back is full of 20 lbs of rice and I purposely loaded it in the worst way possible. it works well and allows everything to move freely