【Thickened Material】The three-layer cover material offers superior thermal insulation. The outer layer is non-woven fabric, with a sponge in the middle and an aluminum film on the inside. This palm protection against frost is made of a three-layer composite that protects against winter frost and tree damage, ensuring your palm thrives throughout the winter. 【Winter Tree Trunk Protection】The winter palm root frost protection plant bag is suitable for tree trunks up to 35 cm in diameter and 30 cm in height, with a maximum diameter of 100 cm, providing ample coverage for a variety of plants. Each palm protection comes with 4 ground stakes, a total of 8 stakes, to ensure it is securely fastened and protected from the elements. 【Thermostatic Temperature Control】Equipped with a thermostat function, our tree root protection maintains optimal temperature levels, protecting the roots from frost and drought. This winter tree root protection promotes growth throughout the winter season. 【Convenient to Use and Reusable】Simply cover it over the palm's roots, close it, and tighten the drawstring. It is also convenient to store and can be washed with clean water and then air-dried for next use. 【Perfect Winter Plant Protection】The palm covers, made of breathable and lightweight fabric, allow plants to absorb air and moisture to maintain healthy growth. At the same time, it protects plants from harsh weather conditions such as frost, heavy rain, and snow, as well as from birds, insects, poultry, and other animals. Note: All data is measured manually, please allow 1-3 cm error due to differences in light and display, there may be color differences, please refer to the actual item received.