Double drawn indicates that the collected hair of a certain length has all of the shorter hairs in the bundle manually removed twice, hence the 'double' drawn. This means that hair extensions that are double drawn will have (nearly) as many hair strands at one end as the other and appear much thicker and not wispy at the ends. This process is very laborious, and therefore makes the extensions very expensive. Methods of integration edit A non damaging strand by strand technique, no glue, no keratin, no beads, just hair and thread. Extremely undetectable and versatile. Last from 3 to 5 months!!!!! I remember when all that the average woman had was her natural hair, and attachments were once-in-a-while luxuries. Looking at my mum in her beautiful wedding dress, and the tiara on her full curly hair, I can only ask where those days have gone. Today, it’s almost unthinkable for a bride to walk down the aisle without hair extensions. Make that Brazilian Hair. Fill a spray bottle up with diluted shampoo and spray the scalp and hair. Use the method of spraying in between each track to get as close as possible to the scalp. Proceed by spraying the rest of the weave. As soon as I wet this hair, it got matted and tangled so bad that I could not even stick my finger through it. This was the first time that I actually had to send someone home without doing anything to the hair. I spent an hour trying to detangle it and this is how far I got. I just had to pull it back in a ponytail and send her home to cut it out. So in order to find out if your bundled hair is any good, first make the person you are ordering from show you pics of their work. A sew-in lasts longer and people usually keep a sew-in up to 3 months. The hair is reusable and can be re-installed after you have taken your sew in out. You can keep your sew in longer but for hair health reasons I wouldn't recommend keeping a weave in longer than 3 months. Be sure to massage castor oil into the hairline and nape while in your sew in weave. This step can be avoided if you opt for a sew-in that more closely resembles your natural hair texture or a style that allows for all of your real hair to be braided and tucked away.