Shimano Xt 10-Speed Chain Cn-Hg95 138 Links

Further evolution of shifting performance
A directional mountain bike specific 10-speed HG-X chain means smoother shifts, lighter weight and greater overall performance. 
HG-X directional chain: Outer side is optimized for front shifting and inner side is optimized for rear shifting.

Special 10-speed Chain for MTB

Designed for MTB riding conditions: High • torque pedaling and muddy conditions.
Durable: Lightweight holes on the link plate are filled.
Mud shedding: Consistent shifting performance under muddy conditions.
HG-X chain is not compatible with other road 10-speed systems.