If you’re a seasoned relay runner, you may have a kit ready to go that includes TP, window chalk, extra reflective vests, and a Therma-Rest. Here are a few things to add to that kid and one running jacket that is perfect for summer relays. Montane Minimus 777 Jacket In a van packed to the gills with six people and all their gear, you may hesitate to bring a rain jacket because odds are you…