Z FLX is Discraft’s flexible version of Z: the same durable base with more give in the hand. It’s sold as the all-weather Z.
Soft premium plastics are made for cold weather. Z FLX stays flexible when plain Z goes hard, and it grips better when wet. Twelve moulds are listed in it.
It goes softer in heat, and it’s a little less stiff on a full-power drive than Z. If you want the Z lifespan with a firm feel, that’s plain Z Line.