There is a fourth suit. For prisoners who have been deemed ‘high risk’ or in need of ‘high security’ (or a nurse has decided they are just sooo cute and she wants lock them up) there is a High Security suit. Based on the regular suits design, the Hi-sec latex suit is more padded then it’s more standard counterpart. The suit features latex padding throughout as well as extra straps and buckles and hard points. The suit also features a helmet. Similar to a pilots helmet, it fully encases the wearing ponies head. The hypnovisor is lower-able and the gas mask, can also be retracted. Thus the wearing pony can have their face exposed, or completely sealed in as aphrodisiac gas is pumped into their helmet and hypnosis programs run on their visor.  
The gas mask is sleek and compact, with no need for bulky hoses or gas tanks. A single, hyper concentrated dose of the gas can be dispensed by the helmet for hours before needing to be replaced by a nurse.  
The suits coloring is flipped from that of the normal suit. The primary color is chosen and personalized by the wearer, and it features black markings and print.