The 'field' is the conventional successor version of the SILVA field 7, the probably best selling compass of the world classic. As one dough er compass, it is particularly suitable for students, Scouts and hikers. As the field of 7, he also has the soft, non-slip case from Dryflex and will be a reliable companion in all situations. Of course, he offers all other features of its predecessor, such as the millimeter scale. Includes removable strap.