What are the main differences between Everything Ponds Premium Liner, Premium Plus EIA Liner, and Classic RPE Liners?

The Premium Liner is a 30 mil laminated RPE liner offering high UV resistance and strength. The Premium Plus EIA Liner is more flexible and has even higher puncture resistance, making it ideal for complex installations. The Classic RPE liners come in three variations (24, 30, and 40 mil) and provide good UV resistance but require covering if exposed to the sun above water.