First, the two front ends of the wig with braids should be compacted. For Weft I cut an old wig that I no longer needed. If you have lying around any old wig, you can buy individual braids in many wig shops. It is also not bad if your tresses are not exactly the same as yours have Blontton wig. As you can see in the images that were with me also not the case. But when I had first sewed the lace, the difference is no longer noticed;) If you need help with sewing the lace, there are numerous online tutorials, which here, for example.
In order to make the braids even fatter, I have two pieces of rolled up fabric and sewn together, thereby ensuring that these Stoffrollen become thinner towards one end. In my case I have this old socks used (Before anyone asks, yes, I have them washed before: P). Many people use instead of fabric enrolled foam rubber, but I did not like how stiff is the foam rubber. If you use cloth instead, the braids remain reasonably flexible, so it looks a little more natural in the end.

Next, the fabric rolls are placed in the braids and fastened with transparent Haargummis. The thicker end of the cloth roll comes up here and the thinner downwards. Provides in attaching the fabric rolls ensure that the hair is well distributed over the fabric so that the fabric is no longer visible at the end.
Now you can sew with the help of your sewing machine, the bands for braids. If you have your tapes Wigsen, you can wrap around the braids of this wig. Again, I have used to secure transparent Haargummis. So you can easily remove it and use the wig to other cosplays the bands :)