Original Penguin Long Sleeved Core Oxford Shirt In True Black, Heritage Slim Fit. A full front pearlescent grey button fastening with a button down shirt collar and adjustable button fastening cuffs on the long sleeves. The signature embroidered Original Penguin logo is situated on the left of the chest in black with the signature woven Original Penguin label at the bottom of the button placket in cream and navy. 100% Cotton. Brand New Original Penguin Shirts Live Online UK.