USB 3.1 (aka USB 3.1/gen 1 and USB 3.1/gen 2) is the successor to USB 3.0.
Identifiable by its bright port, USB 3.1/gen 2 doubles the transfer speed of 3.0 to a whopping 10 Gbps. And like previous versions of USB, it is fully backwards compatible with its predecessors.
Type-C is the connection type and may actually run on a lesser spec even USB 2.0.
USB 3.1 Gen 1 C Male to A Female Adapter Cable
USB 3.1 Type C Male to VGA Male Cable
USB 3.1 Type C Male to DisplayPort Male Cable
USB 3.1 Type C Male to HDMI Male Cable
USB 3.1 Gen 2 C Male to C Male Cable
USB 3.1 Gen 2 C Male to A Male Cable