A clip holds hair with exactly three things: clamp (spring pressure times friction), interlock (teeth passing through the bundle), and surface grip. A thick section defeats all three at once. It props the jaw open near the end of the spring’s travel — exactly where spring force collapses. The teeth no longer reach through the hair. And the polished, ribbon-wrapped surfaces have nothing left to hold with. Every clip in the drawer fails the same way, at the same opening.
Kids are the hardest case, not the easiest: children’s strands are finer and slicker than adult hair, so a thick-haired kid gets both failure modes at once — a bundle bulky enough to prop the jaw open, made of strands slippery enough to defeat friction. That’s why the “no-slip” baby clips and the “thick hair” adult claws both fail her. It was never her hair.
Three failure modes, three fixes — stacked in every clip.
Clamp
Dual 304-stainless springs
Two springs instead of one doubles closing force at the working gap — the opening thick hair actually holds the jaw at. We spec force there, not at the closed position everyone else quietly measures, and 304 stainless keeps its tension past 10,000 cycles where iron springs fade in hundreds.
Interlock
Long staggered teeth, silicone tips
Teeth that pass fully through the bundle and interlock turn hold into a geometry problem — the hair has to deform to escape. The best version of this idea sits in a 1999 patent that grew grip contact area twelve-fold and then expired. We read it so you don't have to.
Surface
Silicone contact strips
Polished acetate is slippery by design. Silicone trades gloss for friction exactly where the clip meets hair — which matters double for kids, whose strands are measurably finer and slicker than adult hair.