This product is designed and marketed to hold men's hairpieces in place, but it's been discovered as a secret fashion tool for women as well. The double-sided tape strips adhere well to clothing that needs minor adjustments.
Sold in a pack of 50, it works well to hold low-cut or backless tops in place. We've also used it in emergencies when a hem gives out. It will hold fabric in place until you can get to a tailor. This men's product is priced better than double-back tape marketed for women's clothing.
And, according to reviews online, it works great for fake mustaches and beards, as well as toupees.
To buy: $9.99 at Amazon.com