The Pet Life 'Neo-Breeze' flexible French terry iced neck wrap is inner lined with ultra-soft French terry cloth that gently hugs the neck area. The exterior shell is composed of flexible neoprene which helps retain neck heat. The gel packs simply insert into the neck cooler and then place the neck wrap in the freezer or fridge and that's it! cool to your desired temperature level and place around the neck. The Neo-breeze is the perfect solution for dogs wanting to keep cool during the hotter weather climates. Heat is known to escape from the neck area, by cooling the neck extremity your dog's body begins to automatically cool down. The neck circumference is adjustable to fit all neck sizes, for very small dogs it is recommended to fasten around the waste area. The summer-cooling dog neck wrap helps prevent heat stroke or heat related complications while regulating proper body temperature when needed. No instructions required and works in a breeze! Sizing Guide: Size Dimensions LxWxH (In Inches): 32 x 1.9 x .5