Harder & Pressure-Resistant: All-in-one design with 3D die-casting process make Whale Fall EVA frame bag hard, pressure-resistant and waterproof. Not easy to peel off, resistant to compression and fall, not easy to deform, and it still maintains the original hard shell shape after years of use. | Environmental Protection Materials: Whale Fall bike frame bag are made of 100% Recyclable EVA and 100%