Cobra Foam Replacements - Locally Manufactured Premium Polyurethane Foam: Flexible Yet Protective Custom-Fit for Pelican Case 1400 Snug Fit with Rounded Corners This package includes a brand new Pelican case, two foam inserts with ten watch cutouts each, and one lid foam piece. The foam used is polyurethane, a common choice for cases, offering flexibility for items while providing robust cushioning, even for heavy objects. Technically, polyurethane is open-cell, allowing air and water to pass through freely, and it weighs approximately 1.2 to 1.3 lbs per cubic foot.