This internal system allows for increased organization in your thunderhead submersible sling pack This internal system allows for increased organization in your Thunderhead Submersible Sling Pack. The padded walls and floor of the insert offer protection against bumps and vibrations for camera bodies, lenses, fly boxes and other valuables. FEATURES Lightweight, padded design for protection Drop-in design for quick assembly Two adjustable dividers included for three possible compartments Compatible with Thunderhead Submersible Sling Pack 150D nylon recycled Cyclepond fabric0.95 lbs