A 4x4" top closure that will give you an invisible undetectable hairline IF INSTALLED PROPERLY. Lace Top Closures, also known as Top Closures, are used to close wefts, tracks or extensions at the front of your hairline. They are also used to create wigs. Density: 120%, Lace Color: Light Brown, Lace Size: 4x4, Lace Material: Swiss Lace. Knots are NOT bleached.