IronMind Small Inner Sandbag - Yellow
Use the yellow liners with the Tough-As-Nails Sandbag Shell as full size or partially filled to make a bunch of sandbag "weights". Fill, fold, and secure with duct tape. Coarser-grained sand works best.
Small yellow mesh polypro liner 20" x 36" (the size of a 100 lb. bag of sand).