A small pack with a lot of uses — keep these filter inserts on hand for face masks, woodworking, gardening, farm work, and any job where dust is a problem.

Each pack contains 4 x A4 sheets (210mm x 297mm) of non-woven hollow conjugated polyester microfibre, making up to 24 filter inserts. Cut to size and slip inside your cotton mask outer for lightweight, breathable filtration that improves homemade mask performance by approximately 88%.

💡 Also brilliant for sewing and craft projects! Use as a stiffener for fabric bowls and trinket dishes, a base shaper for small zippered pouches and pencil cases, or as an extra layer in trapunto quilting for a crisp, raised effect.