Reusable cloth filters made with the same quality & care that you put into your daily brewing. Uniquely designed for a Chemex 3-cup or 6-10 cup. The flap holds the filter propped high, keeping it from drooping down and blocking your flow. Every filter is grown, woven, and sewn in the US from 100% cotton. A basic starter guide is included with each purchase. Good for at least 100 uses.