Heavy duty, endless filament, three strand waxed nylon thread. Works well with Myers sewing awl with the large needle. A very durable, rot resistant thread for all types of leather work, tent making or repair, or sewing any heavy fabric. Heavy waxed thread in a handy 25 yd spool.  Handy and easy to carry in a hunting pouch pocket or possibles bag.  Add a roll to  your emergency kit for field repairs, fishing line or bow string. Available in black No. 85TBL1, dark brown No. 85TBR1 or white No. 85TW1.