There are two types of styles in the Seaslow subculture. I'll show you the first one, which is sailor orientated and reminds one of a cold day on the beach. Typical are stripped, loose shirts in blue and white, but also in gray. Often sailor Seaslows are wearing black or light colored skinny jeans with white, gray or blue shoes. So thats the basic outfit. For jackets you can wear gray ones, which would match the outfit perfectly.