It is an excellent idea to stick with the injury of switching bulky over-ear headphones to in-ear earphones to record the podcast and remain cool and comfortable during the summer sessions. A flat sound with no additional bass to cover up any errors you make and deep isolation is what you desire at the pro-level, where you are not willing to have your microphone pick up your monitor mix.
The Etymotic Research ER2SE is believed to be the gold standard of a neutral sound signature but at a low cost. These earphones offer a special deep-insertion design that offers up to 42dB of noise isolation; this is much better than most other products and almost puts to zero sound leakage. In a more conservative sound, the Sennheiser IE 100 PRO has a very balanced, "honest" midrange that allows you to easily detect vocal clipping or the background noise and lightweight is very comfortable to wear over time. To those that value durability, the Shure SE215 is a workhorse in the studio, with its tough, removable cables and superb seal helps ensure that the audio does not bleed into sensitive condenser microphones.
Best In-Ear Monitors in Podcasting.
Etymotic Research ER2SE: This is a model known by its Studio Edition tuning, which has a sound which is true-to-life and uncolored. It has deep-fit silicone tips that provide isolation that is world-class, and therefore it is the most suitable option in preventing leakage into high-sensitivity microphones.
Sennheiser IE 100 PRO: A monitor with high-quality designed to be used by professionals with a special focus on clarity of the vocal frequencies. It has a flat ergonomic profile that fits in the ear, which is ideal in staying cool during protracted sessions without creating ear sweat.
Shure SE215: These are also industry favorites, though marginally warmer than the Etymotic, and have the industry-leading Sound Isolating technology, which isolates up to 37dB of surrounding noise. The cable is of over-the-ear type so that they will not fall out even when you are moving about your desk.
