"To bardzo świeży styl."

Translation: It is a very fresh style.

[Lord_Pengwyn]

Maybe it means "recent"?

[Jellei]

Yes, "recent" works.

[chce_polski]

If we are using slang like fresh then cool should be accepted too.

[Danny326737]

No, fresh in this context is not slang, "not previously known or used;new or different".