Diamante Blu 150s is produced exclusively for Kiton by a small weaver in England using old looms and presses. It is an ultra-light weight wool that, when made into a suit, wears very comfortably. It is delicate and I therefore wear mine only for more formal events.
Kiton continues to make suits using this fabric. You don't see many due to the English weaver's production capability and also the price point which is high even for Kiton.