The Frigidaire 134440200 upper felt seal helps maintain efficient dryer operation by creating a secure drum seal. This replacement component is designed to line the upper edge of the dryer drum, forming a soft barrier that reduces friction and prevents air and heat from escaping during cycles. It works by allowing the drum to rotate smoothly while keeping clothing from getting caught between gaps. Over time, worn seals can lead to noise, heat loss, or fabric damage. By restoring a proper seal, this part supports consistent drying performance, helps improve energy efficiency, and contributes to quieter, more reliable appliance operation.