Airfoil or Airfoil L fill media in microfiber cloth bag, sewn shut internally

By adding this to the cart along with your Airfoil or Airfoil L, I will fill your bag to the proper level with the recommended fill media, inside a microfiber cloth bag, and sew it shut (rather than the heat sealed plastic bag I was using in the past).  I use pool filter sand as the grains are a consistent size and are sharp and bind together rather than play sand that has very round grains that are inconsistent size and cascade in on themselves under recoil. 

 I would not recommend this option for international customers as the weight will make the freight unreasonable. 

This can be purchased by itself and you can easily install it, if you have already purchased an empty Airfoil.