Shock cord replacement?

I need to a shock cord replacement.
The stuff used by Helsport doesn't seem to be as high quality as other brands and has only lasted for 3 white seasons.
Is the 2mm sold by TierGear recommended or would the 3mm be better?
The stuff used by Helsport doesn't seem to be as high quality as other brands and has only lasted for 3 white seasons.
Is the 2mm sold by TierGear recommended or would the 3mm be better?