Internal & external double Velcro closures for easy sand-filling & safety * 3 sizes (10lb, 20lb & 30lb) of heavy-grade canvas sand bags insert into duffle Handle Bag * Handle grips made of heavy duty webbing; 4 handle positions * Heavy-grade canvas body; Reinforced stitching overall with zipper & snap closures for extra safety, durability & security * Fills with standard playground sand; Sand not included