Running Jackets: 7 of the Best to Wear in 2021 Seven Cool Running Jackets to Start Your Resolution With Nike / On / Farfetch It’s a shame that the period in which most people decide to put on their running shoes again is one of the coldest, most miserable few months of the year. Every January brings a new wave of hope for prospective runners, readying to take on the year with a new pair of HOKA One One after the holiday excess. But, while a pair of fresh runners will certainly help, arguably the most necessary aspect of a new running kit during January and February is a lightweight running jacket.