Tubes protect trees from conditions that threaten survival, such as intense wind or deer pressure. The miracle tree tube shelters from Tree Pro are 100% recycled polyethylene (milk jug plastic) seamless tubes, cuffed top & bottom protects tree as it grows out of tube and provides stability. Tubes come with reusable pre-inserted zip ties and are designed to be used with a stake of the same size (ex. 36” tube: 36” stake).