In my quest to get my training area set up....
I had a cheap Everlast 100lb Bag that had RIDICULOUS hard spots on it.
One part would be very soft and then all of a sudden a spot would feel like kicking a stack of bricks.
SO
I opened up the bag.
It was filled with shredded Fabric....I got a few trash bags ready and started pulling the stuffing out.
There were TEN bags of Sand in it that had shifted to the sides of the bag.
I completely emptied the bag.
Then I took some Foam padding that I had (Auralex Acoustic treatment is what I had but Carpet padding works well).
I made a tube out of the foam and lined the inside of the bag with it.
I put some foam in the very bottom as well...I like to practice kicking the Bottom of the bag.
Then I started cramming the stuffing back in and periodically adding a Sand Bag (making sure they were centered). You have to pack the Bag as TIGHT as you can.
It will settle a lot as you hit it.
I didn't get all of the stuffing back in it (there was a lot of added foam).
Today I opened it up and crammed in more of it.
I'm sure I'll have to keep doing that for a while.
This just adds a nice workout as it is hard to hang up a 100lb bag by yourself
Hope this helps someone.
jmp