I would say a Teba jacket is quite a nice choice for a smart casual look; because of the soft and natural look also the versatility, as well as denim jeans, is a staple in men's wardrobe.
Teba jacket is essentially a sports jacket; however, you could wear it with your everyday office outfit and also for travel as well, it gives a nice look and is relatively comfortable because it is designed with quite soft shoulders (natural shoulders) also it wouldn't have interlining; hence it gives more breathable.
Actually, it has three patch pockets it can be with flaps or without flaps; it's totally on your preference; the cuffs are the same as the shirt cuffs (barrel cuffs) hence you could rolled-up your sleeves to create quite relaxed and casual touch to your look and the distinctiveness of this jacket is the lapel and the collar of the jacket is combined together,
unlike our typical sports jacket/ blazer lapel which I would appreciate the beauty of the jacket, often comes with four buttons; particularly I also admire the hand-sewn buttonholes in the middle of the lapel in order to give a more casual touch to the jacket.
However, it's also a nice alternative to wear in summer, particularly for your smart casual outfits; personally, I would prefer to wear a Teba with denim or chinos and a polo shirt, a pair of penny loafers or perhaps moccasins and as a final touch a silk or linen neck scarves to look cool and stylish.
Denim is quite a nice fabric; the jeans are a pretty good garment and versatile; hence, I would always prefer to have a nice pair of dark-wash denim jeans with a decent fit and look, I don't like too fashional and skinny jeans; I perceive that's quite uncomfortable.
Apparently, Denim jeans primarily came in different shades of blue colours only then, later on, they changed to some other colours like black, white, and grey, the words jeans come from a twilled cotton fabric called "Genoa Fustain" and Genoa is the name of a city in Italy, apparently where the material was produced.
Denim is traditionally made of 100% cotton with a twill weaving pattern and dying with natural colour (indigo blue), which is obtained from the plant called indigo (Indigofera tinctoria), the word denim comes from the French "serge de Nimes", which means the sturdy fabric from Nimes; in the 18th and 19th centuries, the city was the home of large textile factories.
Therefore, Levi Strauss & Co (Levi's) in the 1860s named it Denim and began to make various types of garments such as jeans, jackets, shirts, etc.
