Loading... Please wait...Micro Weft (Cold Fusion System): Micro wefts can be worn for up to four weeks before being removed, re-conditioned, re-taped and re-applied. Being ‘micro’ in size, these differ significantly from some other wefts available in the market as they are so discreet (whether the hair is worn up or down). A full head takes approximately 45 minutes to apply. This system is scientifically proven not to damage hair. In-Salon prices are available on request.