The IMPULSE? Helium Mayfly?s bug-like looks and slow-falling, natural gliding action appeal to panfish including sunfish, perch and crappies. Like other members of the lead-free Helium family, it excels alone or when fished beneath a heavier dropper spoon. No tipping needed, thanks to its 1-inch IMPULSE? Mayfly body featuring quivery legs and a supple yet detailed torso.