Taking comfort and functionality one step further, the FieldPro series are the latest optics to join Swarovski's well-established EL family, delivering revolutionary optical performance and outstanding ergonomics. The FieldPro series come with a host of features new to the EL's, including a strap connector with quick catch button which allows you to simply adjust the length of the strap to the ideal position and integrated lens covers to prevent loss when you're out in the field.