Ultimate Ears MetroFi 170 Noise Isolating Earphones for $19.99.  Order online for in-store pickup at Best Buy to lock in the price, ensure availability, and save on shipping.  Otherwise, shipping is $5.99 for a total of $25.98 shipped.  Here is a screenshot for your reference.  It comes with three different-sized ear cushions and features 16dB noise isolation.  These earphones usually sell for about $42.