Here's what other sites are saying:
When the drizzle damps your motivation, the Essential Run vest from Brooks takes away excuses by helping your core stay warm. Polyester microfiber fabric is water resistant, wind resistant and breathable; soft, brushed collar lining ensures comfort. Durable Water Repellent finish causes water to bead up and roll off. Reflective detailing on front and back of vest increases your visibility to motorists in dim light. Full-length front zipper offers ventilation, and a rear vent increases airflow. Drawcord waist seals out drafts. Moisture-resistant internal pocket manages your music player; zippered pockets shelter hands and accessories. The semifitted Brooks Essential Run vest is not too tight and not too loose.