LensCoat Swarovski BTX Eyepiece Module Black. It also help break up the shape of your spotting scope making it less noticeable to wildlife. The neoprene LensCoat acts as a thermal barrier making the spotting scope more comfortable to handle in hot and cold tempertures. Package Contents: LensCoat Swarovski BTX Eyepiece Module LensCoat SSSWBTXbk: Swarovski BTX Eyepiece Module Black