Tera 80 is continuous filament polyester. 

It offers exceptional high break strength, abrasion resistance, and excellent sewability.

Size is a tex 35 using needle size NM 70-90/10-14.

Suitable for leather goods, use on webbing, reinforcement areas, packs, tarps, hammocks, or any application where a very strong, highly durable thread is needed.  

This listing is for 800m spools used for domestic, semi-industrial, and industrial sewing machines.