A good lining is important for a jacket or blazer for several reasons:

Comfort: The lining helpsto prevent the outer fabric of the jacket or blazer from rubbing against the skin, which can cause irritation and discomfort. The lining can also provide an additional layer of insulation, keeping the wearer warm and comfortable. 

Durability: A good lining can help to prolong the life of a jacket or blazer by protecting the outer fabric from wear and tear. The lining can also prevent the fabric from stretching or losing its shape over time. 

Linings are one of the ingredients in regards of performance and style that can really influence both

Think temperature, drape and touch when wearing your jacket. With the right color and style between suiting and lining a personality is added. Skulls are very popular, don’t ask me why.