EXO is the baseline for Discmania’s Evolution moulds, made by Latitude 64, and it comes in two flexes: Hard and Soft. Hard EXO is the parent line here and Soft EXO is a firmness run of it.
It’s the putter-and-approach plastic in the Evolution range. Hard for players who want a consistent release, Soft for grip and a dead landing.
Neither is built to last at driver speeds. Five moulds are listed, and the Evolution drivers are sold in NEO and Lux instead.