A navy open cardigan and blue patchwork jeans are a nice go-to look to keep in your casual sartorial arsenal. For a more elegant twist, why not complement your look with a pair of loafers?
Navy Open Cardigan with Loafers Casual Outfits For Men
For dapper menswear style without the need to sacrifice on functionality, we love this combination of a navy open cardigan and charcoal jeans. You could perhaps get a bit experimental in the footwear department and elevate this look by rocking a pair of loafers.