I love singlets! I have over 20 of them. One of my favorite companies that makes singlets is Go Softwear! They have just released a new collection that has a lot of mesh and super fun.
Here is a quick overview of the awesome singlets their American Jock line released:
AJ Elite Tri Color Singlet
AJ ELITE SPORT SINGLET
AJ MESH TAKEDOWN MESH SINGLET
You can see the entire new singlet line at the new page on the Go Softwear site. These are a must-have for any singlet fan. My favorite is the AJ Elite sport singlet. I love the mesh side panel