SPECIAL DESIGN: Designed for high instep feet. The instep and length shoe stretcher helps transform shoes into comfortable, well-fitting footwear. It reduces the time needed to break in new shoes. With a shoe tree, shoes can be stretched in both length and height. PREMIUM QUALITY: Made from polyurethane plastic and stainless steel. Durable and more robust than standard wooden shoe stretchers. Features anti-bacterial properties to help prevent odor. PERFECT FIT: Includes built-in holes in the instep area. Plugs can be inserted into these holes to target specific tight spots where pinching occurs. Effective on leather, suede, and other natural materials. EASY TO USE: For best results, leave the stretcher in overnight or up to 2448 hours. The longer it remains, the more the shoe will stretch. Begin with a shorter duration to avoid over-stretching, as overly loose shoes may be uncomfortable.