winter running creates a conundrum. too cold at the start, too hot once you get up to speed.

the OTFInsulator solves the problem by focusing on enhanced breathability and temperature control during heavy activity. a short sleeve build, keeps your core warm while still allowing the body to regulate via the arms. AIRbeam venting allows excess heat build up to disperse and Polartec Alpha® active insulation technology creates sustained comfort without the need to shed layers making this packable insulator a no brainer to have on hand for the variable temp spring, fall and especially winter runs. road, trail and post run, the OTF’s surprising versatility will make it an essential piece in your run rotation and post run as well.

layer with our FLRJacket for the harshest conditions.