Bench bag media that's unaffected by moisture?

[Stockcarver]

Pea Gravel in bags made from old Carhart jeans.

Seems the jeans always wear holes at the knees and pocket areas but the lower legs stay in good shape. I cut them off and use for sand bags.

[mazo kid]

We have an above-ground pool and I use filter sand. Dry it out after season end, sift out the "stuff", sew into jeans legs, or leather bags.

[sparkyv]

Plastic pellets in old blue jeans leg. Sturdy, no too heavy, not affected by moisture.

[Steven66]

But I do not leave them out in the rain.

Trouble where I live is, leaving them out in the air is all it takes to get them damp. I may try some plastic beads. I can always use the sand to make concrete or something

[BigEyeBob]

Ive used aquarium gravel in the past , but currently using vermiculite .

[Smoke4320]

Playground sand in leather bags for nearly 30 years . Never dumped or refilled any .
Bags srill good. Never left outside overnight

[TCLouis]

Mine are filled with sand blasting sand.

They are only about 25 years old so I am not sure if it is a long lasting solution.

[lead-1]

Place I used to work at used beads of glue a little bigger than airsoft bb's for an extruder to melt and layer onto the back of carpet and like contender1 said when they were on the floor they were contaminated.
I got a five gallon bucket of them for filling my bags, works great.

[Littleton Shot Maker]

issue Alice Pack, the extra big ( ranger style ) - Large version not that little ***- stuffed with gear I want when I go into the field…all the gear inside is packed in sealed plastic bags incase "IF" when it rains. nothing fancy, been shooting of the top of a pack for a long time...

[RobS]

I use aquarium rock can find it on sale from time to time

That is what I use too

[Steven66]

Mine are filled with sand blasting sand.

They are only about 25 years old so I am not sure if it is a long lasting solution.

Good point. I'm sure it's too early to tell.

[Bama]

I'm using sand now. I only have to carry the bags 50 yards, so that's not a big deal. Just wondering what else there is besides cat litter that is a good filler; maybe some plastic beads? I have problems with humidity so I prefer something that won't absorb water.

A shooting buddy got me started on fish tank gravel in an old sock. The gravel is coated with epoxy so water can not disolve any of the minerals out of the rocks to mess up tank PH. By squizing the sock, the gravel will move slightly to raise the bag as needed. I didn't think much of the idea till I tried his and have been using them ever since. Fairly cheap at wally world.