https://www.rongduthread.com/strong-thread-applications/ What Is the Use of Sewing Thread ? 01 Footwear Rongdu heavy duty thread used in sewing. 02 Leather Goods Rongdu heavy duty thread can be used in leather goods sewing. 03 Tent and Canvas Rongdu heavy duty thread can be used in tent and canvas sewing. 04 Luggage And Bag Rongdu heavy duty thread can be used in luggage and bag sewing.All Rights Reserved