Not being as experienced as some of you other geeks I have obviously not headed my question properly by the comment made by the extensionist. I have very fine blonde 613 hair so instead of sandwiching my hair between two wefts which would show easily with the slightest movement of my hair. Instead I place the weft with tape both sides of the wefts onto the desired section and then let my hair fall naturally onto the weft so the weft is attached in between my hair making the wefts virtually undetectable. So I take it that this method is cold fusion then? My mistake.
yeah thats not a skin weft, thats just attaching multiple regular wefts onto protac tape for cold fusion.
skin weft is a totally different thing, each of the hairs in woven into a fine PU material so it looks like its growing out the head, no line of stitching or anything. its more expensive, but much easier to hide. hope your not advertising your method as skin wefts!! put it down to experience and get researching

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to the OP - i have used additional lengths skin wefts, they were reasonable for the price, lasted around 10 weeks of continual wear, repositioned 3 times during that where i totally removed the tape and attached new stuff. iv been finding tape alone isnt always strong enough for regular wefts, but plenty for skin wefts hth x