I finished fitting my new Charge Plug with SKS Longboard fenders Saturday. On my other bikes I used red and white reflective tape, with white with red stripes on the rear fender of my green MTB-based commuter. The Plug is black and while at the hardware store I saw yellow and black reflective caution tape. I used that on the rear fender, around the front fork arms and a small strip on the front of the head tube where a crest would go. I then used solid white reflective tape on the Airzound bottle, and a small strip at the bottom of the rear fender. I also refreshed the 4x5-inch white reflective patch I put on the semi-rigid upper back of my backpack. That's Pikes Peak in the 2nd photo as seen from Palmer Park, just 1.5 miles from my house.