Best Waterproof Picnic Blanket Extra Large in 2026: Our Expert Pick After Deep Research

We set up for what I thought was a dry patch of park grass, and ten minutes into a picnic I realized the blanket had wicked up enough dew to make everyone's shorts damp, which nobody mentions until the drive home. I compared a couple of oversized waterproof blankets with my sister-in-law, who hosts a much bigger extended-family picnic every summer, and we both ended up with this 80x80 one since our old blanket fit maybe three people comfortably. Since switching, the damp-grass problem is gone, and there's actually enough room for the cousins to spread out without anyone half-sitting on the dirt.