Features: u003colu003eu003cliu003eBreathable and waterproof, suitable for multiple scenarios u003c/liu003eu003cliu003eMinimalist and high-capacity design, more in line with spatial science u003c/liu003eu003cliu003eChest survival whistle design, ensuring safe travel u003c/liu003eu003cliu003eErgonomically designed to fit the back u003c/liu003eu003c/olu003eSpecification: u003culu003eu003cliu003eMaterial:nylon+dacron u003c/liu003eu003cliu003eSize:15L-400* 280*30mm u003c/liu003eu003cliu003eColor:orange u003c/liu003eu003c/ulu003ePackage include: u003culu003eu003cliu003ebackpack*1 u003c/liu003eu003c/ulu003eNotes: u003colu003eu003cliu003eAll stocks are ready stock. u003c/liu003eu003cliu003eColor may differ slightly from photos due to different monitor settings. u003c/liu003eu003cliu003ePlease allow 1-2cm differs due to manual measurement. u003c/liu003eu003c/olu003eIf u have any enquiries, please do not hesitate to chat with me. Thanks amp; Warmest Regards.