Radiation Footbag, Fluorescent Glow in the Dark Hacky Sack Night Hack 32 Panels Panels: 32 Material: Fluorescent soft leather Filling: Pellets & Iron Weight: 52 Grams / 1.8 ounces Diameter: 5 cm / 2 inches Fill level: Medium+ NOTICE: This bag is made of fluorescent leather, a harder material than usual bags, which also means a longer break in time. This is the footbag for after hours. Extend your kicking hours with this amazing footbag. The ECLIPSE is a great footbag, it is similar to a glow in the dark frees-bee, you put it under a light for a couple of seconds and it will glow enough for you to play in the dark or in an area with bad lighting.