Kids have more mass in their upper bodies so they can flip upside down during a free fall while wearing a sit harness, increasing the chance of hitting their head or slipping out of the harness when inverted. Therefore, it is important for young children to wear a chest harness while lead climbing and rappelling. A chest harness is only designed for use with a certified sit harness and can NEVER be worn alone! * Pre-Threaded Auto-Locking Buckles * For children up to 85 lbs. Weight: 160 g / 5.6 oz Chest: 61-70 cm Certifications: EN 12277/D, CE 0123