Effective but not great in other ways...
These guys definitely do what they say (anti-slip! what a dream!), and they are a good size and stretch to comfortably hold up my hair which is fairly thick.
However there were a few problems:
- The silicone really grips onto the hair (which I realise it is what it is supposed to do...), but I found it hard to take out without breaking some of my hair. The payoff is not worth damage to my hair.
- A few have broken and/or the silicone slip has come off
- Once you loop the tie around, it's hard to nicely keep the elastic side down