The MARA And TERA line of threads is among Gütermann’s top line of polyester threads. These threads use an innovative micro-core technology to produce very strong, reliable, and even seams in any project. MARA and TERA sewing threads are very reliable in automatic sewing. The thread features an excellent tensile strength, wear resistance/abrasion, and makes beautiful seams in any gear it's sewn into. MARA and TERA thread is the ideal choice for thread for all of your outdoor gear such as hammocks, tents, tarps, quilts, sleeping bags, bug netting, or stuff sacks.