When it's hot but not hot. Cold but not cold. You need a proper "jacket" that's not really anything in particular. Something in between a shirt jacket and regular jacket. Something you can wear buttoned or unbuttoned. Something like this, from Taylor Stitch.

It's crafted from 67% hemp, which isn't just for rumpled hipsters obsessed with psychedelic rock and Doctor Strange comics anymore. Turns out, the fabric adds strength and abrasion resistance while giving each piece a stunning character to the fades and hand of the finished garment. It's also naturally pesticide-free, axing the need for chemicals that are harmful to the environment. 

Finished with contrasting natural Corozo buttons and a welt handwarmer pocket, this thing is the real deal. And for a limited time, it's $30 off, bringing the price down to just $138