1. Made of food grade 304 stainless steel, BPA-Free, durable and eco-friendly. The woven wire mesh screen is fine enough for cold brew coffee, it can keep the coffee ground particles in the filter. 2. Easy to use and clean. Just put the filter into a wide mouth Suitable to for mason jar, add coffee ground and water, then put the jar into the refrigerator for at least 24 hours, and you can get the most delicious home made cold brew coffee. It is easy to wash just by water, and dishwasher safe. 3. Healthier and natural, unlike plastic or paper filters, this stainless steel filter will not bring toxic substance, such as BPA or bleacher, into the coffee. The coffee is brewed in a low temperature, the acid in the coffee ground will not be extracted, so you can enjoy the natural flavor of the coffee. 4. Multi-functions, it is not only a cold brew coffee filter, but also a tea filter and fruit filter Suitable to for wide mouth mason Jar.