I can vouch for the Sunrise tramps. I have a Bias-cut black tramp on my boat and it stretches nicely even though I'm only lacing from the rear. It also retains it's stretch very well and does not start sagging. The prior owner had it sitting on the beach for over 2 years in the sun with no cover, and it still looks brand new, and does not feel "dried" out.

Good stuff..