1 ft. of Braided Kevlar Shock Cord (1500 lb Strength with a hollow core)

When you order multiple lengths, one single long piece will be shipped.
This Kevlar thread has a 0.1" diameter. The tensile strength for this shock cord is 1500 lbs, sufficient for any mid and high-power model rocket.
Price is per foot.

Kevlar is very heat-resistant, which makes it an excellent candidate for model rocket shock cord material. It won't be bothered by hot ejection gases. As an added bonus, it is long-lasting. It will easily out-live nylon or elastic shock cords.

How long should a Kevlar shock cord be?

As a rule of thumb, the shock cord should be 2-3 times as long as your rocket. This largely depends on which rocketry hobbyist you ask, there is no real consensus. For a model rocket that is 2 foot long, a Kevlar shock cord could be from 4 to 6 ft long.