New IMPROVED DESIGN TPU Hard Silicone Case for Sprint HTC EVO 4G 3500mah Extended Battery + Cover forThis IMPROVED case is made from a premium thermoplastic polyurethane. The case helps protect your phone from scratches, bumps, and falls. It allows for easy access to all of your phones functions and ports.TPU cases have a really good grip. It holds firm on the dashboard of your car, and will never slip out of your pocket (well, rarely!).  If you want a case with excellent anti-slip properties this is your best bet.TPU cases are firm and less flexible than silicone. One of the biggest complaints we often heard in our Amazon Reviews about the old silicone case is that the sides can get a little floppy. It's less of a problem with phones but on larger devices like extended batteries the problem is really magnified. TPU cases have a rigid structure so they have the dual benefits of being soft like silicone but being very firm almost like a hard plastic case in some ways.Included: 1 TPU case (Phone, extended battery and cover not included)This TPU Hard Silicone Case is compatible with the most all brands of extended batteries offered for sale on Amazon including:Yoobao 3000mah Extended battery/CoverYoobao 3500mah Extended battery/CoverHyperion Extended Battery/CoverLaza 3500mah Extended Battery/CoverGorilla Gadgets Extended Battery/CoverUnbranded/Aftermarket Extended Battery/Covers you see with the Black and white logos (generic)This TPU Hard Silicone Case is NOT compatible with the following brands:Mugen Extended Battery/CoverSeido Extended Battery/CoverSprint/HTC Brand you purchase at a Sprint StoreOther colors are available in soft silicone only.