The Bluestuff B version is a medium friction level compound with all the advantages of the Bluestuff NDX in terms of fast bedding-in and linear performance curve and is targeted for rear calipers of any car or lighter race cars for all-round fitment, where lower friction is required to avoid wheel lockup.
Pads do require careful bedding in before track use. See bedding guidance.
Bluestuff also has good bite from cold and is an Aramid fibre base offering reduced rotor wear and has been popular with Trackday drivers due to its longer wear life than Yellowstuff, it's stablemate.