The highs are not the most detailed, but they are clear and do give an airy feel to the music. The mids are full and forward so vocals will definitely sound great.
Bass is hit or miss though, depending on how well these headphones seal in your ear. If there is a good seal then bass is punchy and tight though not very powerful. Otherwise, it is likely that the bass will sound a bit on the thin side.
Connectivity with source devices is via Bluetooth, so in place of a full headphone cable is a flexible, soft and short cord made of rubber material that keeps the earpieces connected. You won't have to deal with a long and dangling cable.
The ear tips are made out of a soft and flexible material that is comfortable and supports the weight of the earpieces quite well. This is enhanced by the wing tips that further help to keep the headphones in place.
The case can be converted into an armband by reversing it inside out. This is very useful as you can use the arm band to store your smartphone while on a run, along with some essentials like your keys or some cash.
Each of the earpieces have a single button. Different combinations of presses will allow you to pause/play tracks, answer/end calls, adjust volume and do other functions which can be convenient.
While these headphones allow you stay aware of your surroundings, this also means that a lot of environmental sound will get in the way of your music. If you want to zone-in on your audio while running or working out then these may not be the best ones for you.
When you start moving, it is likely that the short but fairly chunky cord connecting both earpieces will flop up and down. This can come into contact with your skin which can be distracting, and can even cause skin irritation.
The highs are crisp, the mids are clean while the bass has good power and thump to it. The bass is not bloated, instead is fast and tight. This prevents the sound from becoming muddy.
The sound signature should work great with bass heavy tracks, though users that want really powerful bass may still find the low end to be quite lacking. The detail on the high frequencies also make these a solid choice for rock music.
These headphones are designed with joggers and gym rats in mind. They won't stop working due to rain or sweat. They can even be washed, as long as it's done carefully and by hand.
The earpieces form an effective seal inside the ears due to the quality ear tips, effectively blocking out quite a bit of noise. The sport clips help keep them in place.
Bass output is very good. It has good power yet at the same time is fast and punchy. It does not bloat the sound at all. The highs and mids are able to deliver a good level of detail that makes the sound quite lively. These will work best for bassy tracks, though rock, jazz, classical and pop will still sound enjoyable.
The earbuds can resist small splashes of liquid or sweat. The hydrophobic cloth material wrapped around the headphones helps to minimize issues relating to moisture.
In stock form, these headphones have a relatively short cable. However, Bose includes an extension cable for extra reach. This can help to minimize the wire length that you have to deal with when going for a run or exercising.
The specially designed Stay Hear ear tips have a wing design which helps to add grip to the earpieces when worn. This helps to ensure that the headphones will not easily get dislodged when on the move.
The ear tips are very soft and flexible. Combined with the ear bud design that does not jam into your ear canal, these are a joy to use in terms of comfort, even for extended periods.
You'll still be able to clearly hear your surroundings with these on. If you want to focus on your music while using these, then the noise that mixes with your music can get quite distracting.