They kept my whole body warmer today and the interior is really so soft. You can actually hear out of them. Means I can dress them up or down this summer. Battery - the earbuds once fully charged can run upto 5 hours without any issues, the case can provide another 20 plus hours or so. My only reservations about these: 1. It appears to me that the beginning of each transmission (the first syllable spoken by the ham) is being clipped in the RF amp by the Tecsun. The first thing i did before i tried them was put on a pair of memory foam tips which improve the sound from any inner ear earphones by some margin and away we went. I highly recommend doing research just to feel as confident as possible come time to instal. So, I would suggest getting that done as soon as you open the box (and checking for missing parts). I am a 6 & these are perfect.