Designed by Shannon "The Python" Kay of K& M Precision Rifle Training, this shooting bag is filled with a 50/50 mix of heavy and ultra-lite fill to provide improved stability when shooting downrange. Featuring dual one-inch webbing straps you can adjust the bag for hard or soft support, and you can change the shape or size to best match your shooting situation. Made with durable waxed canvas for a great shooting feel. Armageddon Gear Python Adjustable Tan Waxed Canvas Support Bag w/Sand Fill AG0745, 5 x 7 x 3 inches