Does anyone have a suggestion of what might be a good thing to use to not get the 'shivers' after a run (right after). The marathon will be my longest run so far and I know I get cold after my shorter runs. I thought a sweatshirt and beanie afterward until I can hit a shower, but what do you think about those space blankets that some marathons pass out? Does anyone know if CTR has these? I've done runs with them in the past and have not seen them. Thanx!