Being outside does present some problems. Namely, a lack of plugs. The solar-powered Rukus can stream tunes from Bluetooth devices or via the low-tech aux-in jack. Bonus: There’s a USB output to charge most phones.
Ride your bike to work? You should, preferably while wearing these. They’re water resistant, dirt and odor repellant, and designed for movement with stretch fabric, reflective tape, and a U-Lock pocket.