If you only invest in one coat this season, make it a trench - Bottega Veneta's classic version is perfect for drizzly days in the city, but still looks super chic. It's made from durable cotton-blend gabardine that's treated to repel water and has gunmetal buckled cuffs engraved with the brand's signature intrecciato motif. The deep back vent gives you a little extra room to move.