The Kastaplast K1 Glow Jarn is an overstable midrange built for night rounds, named for the Swedish word for iron, and molded in K1 Glow so it carries a real charge without giving up the firmness K1 is known for.

Flight Numbers: 4.5 / 3 / 0 / 3

K1 Glow keeps the same durability, firmness, and gumminess as standard K1, just with a glow additive mixed in rather than layered on top. It grips well in cold conditions and holds its charge through a full round of night play.

The low-profile design makes for an easy release on flex shots and flat-out hyzers, and the heavy fade means it holds up against wind rather than turning over when you need it to finish left. It is a comfortable disc to grip and release cleanly even in the dark.

Good for intermediate players who want an overstable midrange for approach shots and flex lines, especially anyone who already plays regular night rounds and wants one disc that covers both visibility and stability.

Want a comparable overstable midrange from a different brand? The Discmania Metal Flake MD5 fades just as hard. Looking for one with more torque resistance on forehand throws? The Axiom Prism Proton Pyro (Reaper Edition) is worth comparing. Shop more of our overstable midranges.

Speed 4.5, glide 3, turn 0, fade 3. Diameter 21.3 cm, rim width 1.3 cm, max weight 177 g.