The limited slip collar functions similarly to a webbing martingale but is constructed from one continuous length of webbing rather than two.  As with the other slip on martingale styles, an accurate measurement of the broadest part of the skull and the neck are required.

Correctly sized martingales should have at least 2 fingers widths between the metal sliders so that when pulled taught they never touch.  There is no separate D-ring on this collar for tag attachment.