Swarovski's stay-on case for the BTX spotting scope modular ocular is designed with a special material that molds to the surface of the spotting scope and prevents the scope from shifting inside the case. The case allows continual access to focusing rings, and the objective modular to separate from the eyepiece 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.