When purchasing Aluminet, the most critical factor is the shade percentage, which typically ranges from 30% to 90%. For agricultural use, a 50-70% shade rate is standard, while dog crates or vehicle covers often require 70% or higher. You must verify the UV stabilization treatment, ensuring the HDPE (High-Density Polyethylene) base is rated for at least 5 years of outdoor exposure. Additionally, check the knitting density and ensure the edges are finished with heavy-duty reinforcement tape and brass or aluminum grommets spaced every 12 to 18 inches to prevent tearing under wind load.