Knowing what they go with is the key to wearing them in a way that makes sense

Since this is more or less an archetype (British moto / military) slim pants are fine here, just be sure the rest of the outfit stays true to the whole aesthetic. If you feel self-conscious about your thighs in slim pants, try longer coats instead of shorter jackets.

In this case, slim fit pants work, since it was a look borrowing heavily from British racing culture of the 60s, copying similar slim silhouettes. It can also work with military-inspired jackets and coats (think suedeheads in bombers & Docs)

Another notable British company that pushed this look was Burberry, specifically with shearling (I have a soft spot for the stuff). In the early 2010s their Prorsum line released the iconic double collar, popped large like a giant, glorious halo. No one has done it better

Ewan McGregor even made a motorcycle documentary in 2004 called the Long Way Around, adding to the resurgence. Unsurprisingly brands capitalized on it, but none more than British company Belstaff, going all-in and tapping McGregor & Backham

It didn’t start with them. Steve McQueen popularized the look in the 60s. In the 2000s, there was a renewed interest in heritage brands, and when looking to the past, pictures McQueen and his Triumphs and motorcycle gear were circulated around the menswear scene.