I wanted to have artificial turf installed in my yard but wanted to know what type of infill to put in the grass.  What I learned from Global Syn Turf is infill helps the turf stand up and keeps wait on the turf to keep wrinkles out and holds the turf down.  Global Syn Turf also educated me on all the infills available to install in my grass.  They have brown silica sand in two sizes, green silica in two sizes, WonderFill in two sizes, ZeoFill and T-Cool infill.  My question is what is the difference and what are the pros and cons of each.  First, I found out the smaller size grain size is for putting greens and the larger size infill is for residential and commercial artificial turf applications.  The brown silica is the lowest level and least expensive infill you can buy.  Next would be the green silica infill, it is green in color to match the color of the grass so you don't see it.  Global Syn Turf told me the infill is down in the grass and you really don't see it.  At most you would see the infill on the edge where the turf meets the hardscape.  The WonderFill is an infill that is a true green infill with no other colors.  This infill is coated with acrylic and is Anti Microbial.  This doesn't allow the infill to absorb water or dog urine and is a premium infill.  The ZeoFill is an odor absorbing infill that absorbs the urine smell from pets.  This too is a premium infill.  Lastly is the T-Cool infill, this infill keeps the grass cooler.  This infill absorbs water and slowly releases the vapors and cools the artificial turf down 30-50 degrees.  Now what infill to go with?  In speaking with Global Syn Turf we both agreed that the T-Cool Infill would be best for my application.  It will help keep the grass cool in the summer months in North Carolina.  It is anti-microbial to help with the dog urine on the turf.  Our turf has been installed for two weeks now and we love it.  I wanted to write a great review for this company for helping me decide what turf infill was best for me.