Is there a way to make a stackable bag,maybe someone has already replied for this) In some places the ground isn't really flat and even with a tall bag sitting on a block of wood sometimes you really gotta squeeze it to get the height needed for a good shoulder weld that is comfortable and not putting torque in your back from uneven ground heights.
So maybe a zippered extension or several of them in say 1/2 or 1 inch increments of high density material to aid in stability on the bottom of the bag to get additional height instead of getting a block of wood that doesn't conform to the uneven ground.
Also some big guys don't lay as flat to the ground as others and lay "tall" as in height from the ground to the shoulder.
Something like this may help. This way if a guy had 3 or 4 thicknesses he could tailor the height and get comfortable no matter the ground condition.
So maybe a zippered extension or several of them in say 1/2 or 1 inch increments of high density material to aid in stability on the bottom of the bag to get additional height instead of getting a block of wood that doesn't conform to the uneven ground.
Also some big guys don't lay as flat to the ground as others and lay "tall" as in height from the ground to the shoulder.
Something like this may help. This way if a guy had 3 or 4 thicknesses he could tailor the height and get comfortable no matter the ground condition.