The Thunderhead Grande Submersible Duffel is the must-have bag for your next adventure If your idea of an insurance policy involves the world's most technical and submersible construction, the Thunderhead Grande Submersible Duffel is the must-have bag for your next adventure. A massive 100L carrying capacity, stowable backpack straps, and exterior attachment points mean you won't have to worry about leaving anything behind. Trusted by critical service professionals from Antarctica to the Indian Ocean, there's a reason why you'll see this duffel in the most demanding environments around the world. 900D TPU coated nylon Cyclepond fabric 30" x 15" x 15" 100L (6,102 Cu. In.) 4.80 LBS