Acne Studios Leather biker jacket Condition: Like new - no flaws, buttery soft leather. Authenticity: I will include a print out of my receipt from Net-a-Porter. Size: 38 Color: Black Materials: 100% leather (Lamb); lining: 100% viscose Fit: Fitted, cropped. Modeled after traditional motorcycle jackets, Acne Studios' iteration has a cropped, boxy fit. It's made from lightly grained leather and finished with numerous zips - including ones on the cuffs - and a wide belt at the cropped waist.