Our Amish hand-crafted Poly Wren House is as cute as a button! They are made of poly lumber to withstand those harsh weather conditions. Poly lumber is made of recycled high-density polyethylene materials. It resists splintering and rotting. No need for chemical weatherproofing treatments. It is also impervious to normal wood destroying pests. Our Poly Wren House is also made with stainless steel hardware and aluminum hinges. The bottom comes off for easy clean-out. Choose from many colors.