S: The shoe trees are constructed from durable plastic and stainless steel for long-lasting performance. The coil spring spine ensures flexibility and compatibility with various shoe styles, designed to resist cracking, chipping, or breaking. SPECIAL DESIGN: Measuring 8 x 32 x 32 cm, the shoe tree features a dual-side steel spring connection that allows adjustable length to accommodate different shoe sizes and types. PORTABLE: Lightweight and compact, the shoe tree offers a space-saving design ideal for home use, travel, and business trips. Easily fits into luggage without adding bulk. EASY TO USE AND MAINTAIN: Simply insert the shoe tree into the shoe for immediate use. The smooth plastic surface is easy to clean and ensures long-term durability. MULTI-PURPOSE: Suitable for a wide range of footwear including athletic shoes, children's shoes, women's boots, and high heels, this shoe tree helps maintain the shape of soles and uppers, keeping shoes in optimal condition.