The Swarovski Stay-On Case for STX Straight Spotting Scope modular ocular is designed with a special material that molds to the eyepiece and prevents it from shifting inside the case. The case allows continual access to zoom and focusing rings and the eyepiece modular to separate from the objective modular without removing the case. Padded for protection against bumps, this stay-on case is a plus for transporting your scope through an airport or in the field. When it's time for observation, your scope's features are easily accessed by conveniently placed snaps and zippers.