The DualSeal (SKU HHDSK01‑CA) is a compact, non-vented chest seal kit, meeting TCCC standards for treating open or penetrating chest wounds. Each pouch includes two sterile hydrogel occlusive seals—3.75″ × 3.75″ each—designed to quickly and effectively seal wounds, even in wet or contaminated conditions. The seals offer battlefield durability with a 5-year sterile shelf life and performance across –10 °C to 40 °C]