Fiber hot cup lids are made from bamboo and unbleached plant fiber, an annually renewable resource. Contains no added PFAS. Soak proof and have no wax or plastic lining. Durable, freezer safe and certified compostable in 2 to 4 months in a commercial composting facility. Fits: 10 oz to 20 oz Cups; Material(s); Unbleached Plant Fiber, No Added PFAS; Color(s); Natural.