I spent years looking for the right consistency rear bag and could never find it. One day before heading to the range I took a dress sock (fine stitch thin material) and filled it with a variety of beans and rice out of our pantry, then tied off one end, doubled it back up, tied off again and called it good. Turns out it's the perfect rear bag. It weighs basically nothing, conforms very well to whatever I'm shooting, is easy to pack around, has lasted me 5yrs now, and probably cost me $2 all said and done.