Plastic,【The material of shoe tree plastic】:Shoe trees men are made of sturdy and durable plastic and steel.Safe and environmental. Lightweight, shoe trees for sneakers Length:13"" / 33cm, fit men's shoes size from 6-12,【Shoe trees for men design】:The length and the width of shoe trees men can be adjusted. Mens shoe trees can keep your shoes in great shape, Perfect for travel and fit your boots,leather shoes,sneakers,etc,【Simple to use】:Just simply insert these convenient plastic shoe tree 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,【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 shoe tree men is a must for optimum shoe care and retaining its original form,【Services for shoe stretcher men】:Any problem when using this plastic shoe trees for men please don't hesitate to contact us first. As our persueing goal, we will do every effort to make you satisfied with our products and service