Combat Response Insertion Strike Integration Suit (C.R.I.S.I.S.)
On land, a hanar is a clumsy creature, graceless and slow, with little strength or dexterity. To circumvent this, they adopted the drell, who acted as their hands and feet. However, at the dawn of the 2180s, the hanar had realized that they could never rely solely on the small numbers of drell who had escaped extinction to fight the coming war against the Reapers. With the help of Dr. Liara T'soni and the prothean AI Vendetta, the hanar discovered a way that the hanar could join the fight even on the mostly terrestrial planets of the galaxy.
Before their annihilation at the hands of the Reapers, prothean warriors had employed large suits known as CRISIS to engage their foes on worlds where the atmosphere was toxic, or the gravity too heavy for a prothean to comfortably fight. Once the hanar got their tentacles on the designs for these suits, they quickly adapted them to hanar and drell physiology. The suits could contain either air for the drell, or an aquatic environ for the hanar, and greatly modified the users strength and speed, as well as mountin element zero fueled jump systems that allowed them to leap over the most hazardous of terrain and be inserted into any climate. The suits worked equally well in toxic air, vacuum or water, and mounted high powered mass accelerators and missile launchers as effective anti-vehicular weaponry, as well as powerful kinetic barriers.
The suits stood about two meters tall, and looked blocky and clumsy. However, thanks to their internal eezo cores, they were light and agile, capable of running at 55kph on two stubby legs and jumping over 100 meters with their jump packs. They had four arms, two of which were fitted with mechanical hands suitable for delicate tasks that folded up into the larger main arms which mounted the suits weapon systems. The pilot sat or floated inside of the suit, and operated it from a delicately balanced neural interface, based on the use of prothean mental manipulation technology.
The first suits did not enter production until late 2182, and the first suits saw service during the First Siege of Kahje, where Dr. Liara T'soni proved that they were also suitable for use by other bi-pedal species. Though the suits did not see extensive use during the Second Pan-Galactic War, the conflicts in which they were fielded proved their capability, and set the other races of the galaxy scrambling to come up with powered armor of their own.
(authors note: look up "Tau Crisis Suits" if you want to know what they pretty much look like)