https://electronics.woot.com/offers/hush-hoops-ear-plugs Hush Hoops Silicone Reusable Noise-Reducing Ear Plugs (Black, 70551BKAMZ) on sale for $1. Shipping is free for Amazon Prime Members (must log in with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.