Features 1、Perfect for Fermentation: Sourdough starter jar covers are ideal for monitoring and controlling the fermentation of your dough. The elastic edges ensure a close fit, keeping the dough secure and optimized for both rising and ventilation. 2、Versatile Usage: Not only for bread making, these covers are also perfect for topping sun tea jars or brewing kombucha. The breathable fabric allows for proper airflow while preventing unwanted debris, ensuring a clean and successful fermentation process. 3、Reusable and Eco friendly: Jar covers are reusable, making them an excellent eco friendly alternative to disposable plastic covers. They offer an effective solution for maintaining the quality of your dough and reducing environmental impact. 4、Lightweight and Compact: These jar covers are incredibly easy to store and transport. They will provide practicality and convenience whether you are a passionate home baker or a professional chef. 5、Reliable Linen: Made with premium linen materials, our covers are designed to withstand repeated usage while maintaining elasticity. Sized to fit jars with diameters ranging from 3‑4 inches, these covers ensure a secure and snug fit for various containers. Specification Item Type: Sourdough Starter Jar Cover Material: Linen Quantity: 5pcs Applicable Jar Mouth Size: Approx. 7.62 ~ 10.16cm / 3 ~ 4in Package List 5 x Fermentation Covers