The Soma New Xpress has got a HyperTex carcass that is as tough as Kevlar but is way more supple so it won't ride like a brick. Cut resistant and pinch flat resistant. Smooth inner surface for less tire rub. The tread is more durable also because of the added carbon. It is slightly narrower than the Grand Randonneur tires but there for more suitable for a 650B-conversion of your old 700C-steed.
Beige sidewalls with black, terracotta or cream tread. Made in Japan by Panaracer.