Nothing saves the day quicker than a handy safety whistle. The next time you set out on an adventure, grab the Whistle Sternum Strap Buckle Kit by Gear Aid™. Featuring a ¾’’ sternum strap buckle with built-in safety whistle, quick attach tri-glide and detailed instructions, this high-quality, no-sew buckle replacement kit will stabilize loads, while keeping you safe.