Unisex Design - Innovative tech redefines PFD fit and function, no need for gender-specific models Orbit Fit System - Lightweight foam layers form a flexible, pre-curved shape that adapts to your body 4-Way Stretch Fabric - Enhances fit, flexibility, and comfort by stretching in all directions Engineered for peak performance, the NRS Ninja PFD is the supreme low-profile jacket, ideal for paddlers of all kinds. We've focused all the buoyancy into a smaller area for unmatched range of motion, ensuring the Ninja stays unobtrusive and out of your thoughts.