The collar is pretty thin, soft and elastic, but unfortunately without safety lock. The one hand has the advantage that the collar is not permanently stored on the cat. The security is to be built because the whole necklace is beautiful elastic (like a rubber band). But I'm not sure if that the 'real thing' - and works - so with panic cat. Have therefore a somewhat smoother closure sewn. Very good and not mentioned: The collar has woven reflective stripes !!!!