Silk top caps are also known as Triple Reversed Knots or Hidden knots. Silk top caps are the best money can buy, and provide the most realistic looking scalp in comparison to the other cap options. The reason is because the knots are completely hidden between the silk and the lace. Silk top caps are designed using a high quality silk base at the top/crown or full with lace or thin skim material in the front, back and sides. Wearing a wig cap is not necessary with Silk top Lace Wigs because the silk is undetectable, offering the most realistic scalp possible.