Try going to the "Surfaces" window, when selecting the hair in the "Scene" window.
Find "Gloss" and "Reflect", and turn those values down for that material. You can also bump-up diffuse and specular, or reduce them, to tune the suits material. (There may be a few materials listed for the outfit.) If there are "images" that enhance the "Reflect", or "Specular", they may be over-exaggerated. For that "wet superhero buffed-plastic latex look" that all wet buffed-plastic latex-wearing superheros have...
Also, your lights, if you added any, think about removing them when using iray, or dialing them down. Iray has environment lights that work great for most purposes. If you use a GPS to figure-out latitude and longitude and set the correct time of day and season of the year, and date. xD. Adding the normal DAZ lights will cause an undesired "stacking" of light-rendering, leading to over-blasted light values. (Exaggerated in shine and bump-maps and specular and diffuse, old-code.)
This includes the "Camera light", if you use a camera. (The Iray settings have an option to turn-off those lights, if you NEED to use the DAZ default lights which are more tuned for screenGL rendering and DLight. You can make them work, but it is a challenge as none of the values represent anything realistic and they have no similar representation from one light to the next.)
