Head Strap

think I'd skip that for my next muzzle as it is probably uneeded and just stands in the way if you are using a slip-lead/leash or a prong collar. it also has the same issue that the muzzle has with the screws being hard to unscrew and therefore very hard to adjust (I didn't succeed yet).

Perfecto

Fantastic product and quality my dog loves to wear his muzzle fits perfectly with enough pant room and Fantastic service from the muzzle movement