Justin Theroux Bundles Up And Hops On A Hog

Justin Theroux continues to enjoy his time in New York City ... even when it's solo!

The actor, 40, picked up a few necessities at a local Duane Reade drugstore Sunday before hopping on his motorcycle, sans GF Jennifer Aniston. He made sure to strap a box tightly to his bike -- and a bullseye helmet to his head -- before taking off.

Despite the fact that the weather has been in the comfortable 60s in the Big Apple, Justin was dressed like it was the dead of a winter! He was bundled up in a leather jacket, zip-up hoodie, gray scarf, newsboy hat and gloves.

Well ... all-black bad boy threads are his uniform!