This is your compass if you are looking for a high-performance thumb compass with a rotatable housing. With this feature, you can use the Silva 1-2-3 system for easy navigation. This compass has all the high-end qualities that you need for fast navigation while running., , Arc Jet 360 comes with an attachable thumb plate for those who prefer the more classic thumb grip. Simply slide it on/off to the baseplate with a simple click. Just try it out and see what you like best. , The thumb band comes in two versions - soft and firm. They are both included in the package. , If you like to use scales on your compass for measuring distances on the orienteering map - Arc Jet 360 comes with scale stickers that can be attached to the baseplate., For more detailed map reading, you can get the Arc Zoom magnifier as an optional accessory. The Zoom is easily attached to the baseplate of your thumb compass. Due to its functional design it becomes well integrated with the compass.