Desirable Life Bonded Nylon N66 Sewing Thread 1500 Yards Size #69 T70 210D/3 for Leather Denim Hand Machine Craft Shoe Bag Repairing Strong Heavy Duty High Temperature Resistant Waterproof (Beige)

I use this for altering and tailoring single-ply powerlifting equipment and boy does it hold fast. Even an amateur to sewing seams like me can't do too badly with thread this strong! I've sewn up pieces of equipment that people have squatted 400, 500, even 600lb while wearing without a single issue, and that was just with an easy backstitch pattern that I learned to do by hand! It's solid stuff, super high tensile, and seems to be good for anything from patching up a fraying seam to high-stress applications. I will note, you can still cut/slice it with an average pair of scissors or a knife- it is NOT cut-proof.

High quality, sturdy thread. Very black.

Sturdy nylon thread!

Works well for extensions and was so much better then cotton string

I wanted a dark brown color, but there was not so I chose this color and thinking that is working for me!

I used this for commercial purposes and lasted couple of years. Strong threads I can trust. Highly recommended!

Love it

We have a very large inground pool and noticed a couple tears in the cover. This product was easy to use and did the trick! Works great and saved us money on a new cover