These heavy-duty bag weights can hold 30 lbs. of sand, rocks, steel rods or any type of dry substrate. Made from thick and durable yet lightweight nylon material, they travel easily and stand up to all kinds of weather. The ballast and dual fastener style tent weight is also very easy to hide and will not take away from your display. Prepare for all weather and utilize these sandbag weights to ensure your tent stays in one spot! Sold in packs of 4. SUBSTRATE NOT INCLUDED! IF SANDBAG IS FULL, SUPPORT FROM BOTTOM. DO NOT LIFT FROM STRAPS.