The look of the Breen masks, which includes a "snout", was derived from the visual suggestion that they are a snouted species, like an Arctic wolf. The Breen costumes were problematic for the actors playing them, since they made both seeing and breathing difficult: there was only a single small hole in the beak, about eight inches from the actor's nose, according to stand-in and stunt double Todd Slayton, who played Thot Gor. The costumes also included big, clumsy boots, and the outfits were layered like an armadillo, making movement difficult. The helmets, which were complicated to put on and remove, were held together with magnets, and were prone to falling off when someone bumped into them. The switches for the lights on the helmets were inside the helmets, requiring the actor to remove the helmet to turn the lights on and off. For reasons unknown to production personnel, the nine-volt batteries that powered the lights lasted only minutes before burning out.