12 small foam windscreens perfect for fitness classes, including bike or spin class, aerobic or step classes, body pump, etc. Includes custom holiday song lists. Fit Halo Aviation Headset. Also good for computer gamers, telephone headsets, tv studios--anyone who uses lavalier, lapel, or headset microphones. IMPORTANT NOTE: If you force a foam windscreen on a microphone that is too large, it will rip. (Note: larger and smaller Compete Audio windscreens are available). If your microphone is too small, it will fall off. If the windscreens don't fit or you are unsatisfied for any reason, just return them via Amazon for a full refund.