Does anyone know whether this type of bobble (photo not great but they’re like small, clear elastic bands) are more/less likely to break fine hair? I’ve bought them for DGD who has very long, fine, slippery hair and all normal bobbles quickly slide down and fall off any attempts at ponytails or plaits. The woman on the till said they’re gentle but am not sure she really knew. I don’t want to give them to DD if they’re likely to break DGDs hair.