The TPU material, silicone sides, and "dimpled" texture on the back give this case a good amount of grip to your device while on.  And this is accomplished with only a small increase in thickness.  All the holes line up perfectly, allowing you to charge or plug in headphones while the case is on.  I have 4 cases for my tablet, and this is my favorite overall.  It's been on my device for about 6 months and will probably stay there until the device dies.  Good job.  I really wish this type of case was available for my phone.