poor workmanship
Great when it works. The first one I purchased experienced an unexpected deterioration of the rubber connectors. I sewed one back together, but the material had deteriorated too soon and it did not hold.  I didn't see any way to contact the manufacturer to obtain replacement rubber grommets and decided to purchase a second one. Within a couple of weeks the thread suddenly came loose, causing the small beads to cascade down into my shirt, I re-tied  it, but what a disappointment, No more for me though I liked then when they worked.
Rating: 1 stars