stainless steel materialOur double-layer coffee filter is made of food-grade stainless steel material, safe, healthy, environmental-friendly, sturdy, and durable to use. High-efficiency filtrationMesh design allows coffee to filter quickly and smoothly to achieve the best extraction rate, the coffee powder will not filter into your coffee mug, and you could enjoy the process of how to make a cup of coffee by yourself. Washable and reusable It is very easy to clean and helps you save much effort and money, really practical and affordable. Attention please-Clean it after enjoying your coffee ASAP to avoid coffee grounds that are difficult to clean after drying. Easy to use Firstly add coffee grounds to the filter, slowly pour in hot water, letting the coffee maker drip out the water through the fine pour-over filter, then remove the coffee dripper when finished, and ready to enjoy your coffee. TAKE IT EVERYWHEREIt can be perfectly used in a home or office, and it is lightweight and has a compact size for easy carrying, so it is also great for use at traveling, camping, business trips, etc.