They are very similar to those velvet things for buns only smaller. You can wither plait the mane then twist and secure or just put a section of the mane throught twist a secure. They look ok for dressage but would not be suitable for showing.
Glad I'm not the only confused one!! Just wondered if they would be a quicker alternative for plaiting for dressage and hunting (not really into showing and don't bother for SJ!) Although as Toff has a long mane, I'm not sure they would work