The all-leather flagship series "potential" exclusive to master-piece directly-operated stores.

The main body leather uses carefully selected Japanese steer hide. After chrome tanning, 3M waterproofing agent is added to the drum during dyeing to penetrate the waterproofing agent deep into the leather fibers.
Since the waterproofing agent penetrates deep into the fibers, it continuously prevents water intrusion not only from the back and sides of the leather but also from scratched areas.
A large amount of special waterproof oil is then infused, resulting in a supple and soft touch. The surface is finished to achieve a fine texture similar to kip leather.
This is the ultimate soft smooth leather, requiring perfect balance of tanning, dyeing, and oil formulation to achieve extreme softness.
This leather has passed the "SCOTCHGARD" monitoring test for waterproof, oil-resistant, and stain-resistant properties (fingerprints are less likely to remain). Since this monitoring test is conducted even after shaving the surface, the effectiveness does not diminish with use.

Outlast is used in the shoulder and back areas that contact the body. This material uses Outlast coating applied at Outlast-designated coating facilities developed for NASA. Microcapsules containing paraffin wax coated with Outlast absorb excess heat from the body and release the stored heat when temperature drops, maintaining a comfortable temperature (31°C~33°C).
The lining features original jacquard fabric with the master-piece logo.