The material of shoe tree plastic- Shoe trees men are made of sturdy and durable plastic and steel.Safe and environmental. Lightweight, easy to carry.Durable plastic toe and heel section with stainless steel to adjustable shoe tree Length10"" / 26cm, fit Women's shoes size from 35-41 Simple to use- Just simply insert these convenient shoe stretcher men into your footwear to preserve the shape and keep your shoes look perfect shoe shaper for men is safe and effective to protect your shoes in perfect shape. Tension spring coil bends to fit most sizes.An excellent gift for the shoe lover Outer Material: Plastic Inner Material: Without inner material The function of shoe tree- Shoe trees are known to prolong the life of your dress shoes and keep the shape of your loafers, brogues, wingtips and any other types of shoes you wear for work and special occasions, regular use of a plastic shoe tree is a must for optimum shoe care and retaining its original form Shoe trees for men design- The length and the width of plastic shoe trees can be adjusted. men shoe tree can keep your shoes in great shape, Perfect for travel and fit your bootsleather shoessneakersetc