The differences between the Faux Mink and Silk lashes are subtle but noticeable mostly to your client. The Silk lashes have a silky, natural feel to them, they are more flexible. The Faux Mink lashes are a little more bold, slightly glossier than the Silk. The Faux Mink are a little more rigid; both types of lashes are made of the same materials (PBT). Deciding between Mink and Silk can depend on your clientele.