The Cascade Designs MAC Sack is a special-issue compression dry sack designed exclusively for the U.S. Marine Corps. It's the ideal solution for low-capacity, low-profile watertight protection in extremely abusive environments. It's made to order for year-round guiding, daily abuse and for those who are particularly harsh of their gear. Marine Green.

• Extreme Durability: 210D oxford nylon with high-tenacity polyurethane coating.
• Air-Tight Compression: Low-profile, flexible purge valve slides easily into hatches and backpacks.
• Watertight Seal: Exclusive SealLine DrySeal^™ roll-down closure.
• Light Weight: The best combination of light weight and extreme durability for a wide range of uses.

The MAC Sack is constructed with an easy to use single strap roll-top closure and a bottom handle that can be used while wearing insulated gloves. An automatic purge valve lets air out to compress the bag. The valve is a flush mounted, hands free check valve with no metal or plastic parts. Durable, lightweight fabric with smooth inside and out surface, facilitates packing and compressions. Withstands 20 home launderings with no failures.