Powerclaw Latching System The PowerClaw latching system (Us Patent No. 8,297,464) used on all Nanuk cases is engineered to keep your case closed during the toughest of missions. The PowerClaw clamps the case tightly closed using compressive force while the integrated slide lock prevents the case from opening during transport or when dropped. The super tough nylon construction ensures your precious items remain safely inside the case no matter where the journey takes you. Waterproof - IP67 Rated Nanuk Waterproof Cases IP67 Rated (Submersion at 3ft for 30 min) The waterproofing seal used in all Nanuk watertight cases are custom designed to fit their products. The seal is designed to resist deformation and fatigue, ensuring a long lasting watertight seal. Nanuk waterproof cases are ideal for applications such as search and rescue, marine transportation / storage and diving.