PS Paul Smith 's versatile shirt is a great all-rounder, as it can be worn buttoned-up with a pair of smart trousers or layered open over a T-shirt and jeans. It's cut from cotton-flannel and topped with a classic collar and two sizeable chest pockets that take inspiration from workwear styles. Shown here with Folk trousers, YMC T-shirt, adidas Originals sneakers, The Workers Club socks.