Brooks LSD Lite Jacket
Here's what other sites are saying:
The highly packable Brooks L.S.D. Lite Jacket -Lightweight Shelter Device-is a perfect carry-along for workouts in unpredictable weather. Extremely lightweight microfiber polyester fabric is highly breathable, and it resists light precipitation thanks to a Durable Water Repellent finish. Rear vents increase breathability. Internal pocket manages your music player, and jacket packs into its own zippered pocket. Hood can be stowed away when not in use. Reflective detailing increases your visibility to motorists in low light. The semifitted L.S.D. Lite Jacket is not too tight and not too loose.