The weather is getting colder, but you're not going to let that slow you down. With the Smartwool Men's Double Propulsion 60 Hooded Insulated Vest, you can get the miles in without having to suffer the chilly way. Built with next-to-skin merino wool, this insulated vest works to regulate your temperature while you work on your run. Stretchy side panels offer free range of movement while you workout, so that no minute or inch will be lost due to a wardrobe malfunction.