SPECIAL DESIGN: Designed for high instep feet. The Instep and length shoe stretcher transforms any shoes into perfectly fitting, comfortable ones. It saves you weeks of time to break in a pair of new shoes. with Acsergery shoe tree, your shoes can be stretched both in length and heights. .PREMIUM QUALITY: It is made out of polyurethane plastic and stainless steel. Sturdy and more durable than normal wooden ones. Also, It is anti-bacterial, effectively prevent the odor. .PERFECT FIT: It also come with Acsergery little built-in holes on the Instep area. Plugs inserted into the holes can stretch the shoes in problem spots, where pinching occurs. Works well with Acsergery leather, suede and other natural materials. .EASY TO USE: Follow the instructions below, you will usually have to leave the stretcher in at least overnight, and sometimes for 24-48 hours. The longer you leave the stretcher in, the more the shoes will stretch, so you might want to try a shorter period of time first, as shoes that are too loose don't feel good either. .