These MEC Optimus pants are in excellent condition!

These convertible pants/knickers have plenty of technical features, so you can hold your helmet high among your fellow mountain bikers. 
Yet they're hipster enough to give you cred with your commuting colleagues. 
The cut is "ride position" to prevent plumber's butt. In pants mode the fabric offers weather protection (but they're not seam-taped, so don't mistake them for full-on rainwear).

Main fabric is made of 50% nylon, 43% polyester, 7% spandex
Trim is 88% polyester, 12% spandex
Two front pockets, one side leg phone pocket and two rear pockets
Zippered vents on thighs allow temperature regulation
Knee dart allows mobility and the use of knee or full leg protective padding
Zip-off legs turn the pants into knickers
Cinching mechanism on pant hem helps avoid drivetrain entanglement
Reinforced stitching and bartacks in critical locations

Style number 5019898
Gray, size 34 see pics for measurements.