Our whistle is the ultimate friend of a sailor or coach. Whether you want your sailors to hear you over the water as a coach or you want to make sure your sailor has a loud whistle attached to his/her life west, this is the product to go for. VERY loud and easy o spot due to bright colors. 3D printed and comes in a nice black box with a neon yellow rope that you can use to attach to your life vest. Original 3d design by Scarlet Engineering.