The Envy is a a slightly stable putter which beats in to a neutral flight for long distance throws. It has high speed stability with minimal fade after a small break-in period. The envy is "Lid-Like" low profile and feels great in the hands. Plasma is a premium shiny swirly plastic that beats in a bit quicker than proton but not as quickly as electron. Plasma plastic has a reflective sheen to it that is stunning in the sun.
Plasma Plastic: A stiffer premium plastic with good durability and a glittery sheen that reflects beautifully in sunlight.
