CueCue Pet's Sanitary Fashion Undergarment for Proestrus (in-heat) Dog&rsquo;s CueCue Pet's sanitary undergarment gives your pet confidence and comfort. Designed to reduce stess and anxitery associated with Proestrus Keeps your pet clean and gathers estrus discharge, we do advice that you line the garment with diaper liners Available in a variety of sizes | Please see Sizing Chart Image, if your pet is in between sizes then be sure to go a size up Not sure how to measure your pet? See end of description below for How To: