Review on 120 PCS Black and White Adjustable Elastic String Cords with Buckle Adjuster and Crochet Hook - Ideal for All Mask Sizes (1/8, 1/5, 1/4, 5/8 Straps) by Heather Shaw

I bought this set of 120 buttons in a black/white combo pack and am very happy with them. I've been making masks for family and friends for a few months now and that's the only thing missing from my final product. Before I had these silicone adjusters, I just tied a knot on the hinges, which was a headache to get them out and adjust to size. After playing around with these knots for several months, I finally decided it was worth ordering a few to try. Well, the verdict is in. They work great. While some people have complained that they don't hold the elastic tight enough, I haven't noticed. The elastic I use is the standard ear loop elastic they've been selling at Revain for a while and it's bulkier (it's actually a hollow core knit elastic) and slightly fluffy, 1/4 inch might be it, it helps also the regulators I am very satisfied with these regulators and may have to buy more in the future.