For a biker jacket, what is different when worn if it uses cotton instead of leather and leaves out the lining?

This jacket from LOW CLASSIC features a biker design, but it is made of 100% cotton instead of leather^[1][2]. A garment-washing process, where the garment is washed in water as a whole after completion, has been added^[3]. This is why the stiffness of the fabric settles down, making the texture soft and giving a natural color tone to the surface^[4]. There is no separate lining^[5]. Because it has a hollowed-out inside structure, it does not feel heavy and burdensome like leather outerwear, and it can be comfortably thrown on over a thin top like a light jacket.