The tonal balance of the bass slightly favors the mid-bass attack with the sub bass and upper bass being more neutral in the mix. For me, level one was best when I still wanted to be alert of my surroundings, while level 2 was best if I just wanted to be alone entirely. The strap that goes across the toes--why cant they make that two straps that are closed together with the velcro strap on top? That would make it so much more adjustable, more versatile. Easy install, good silicone, and lightweight. I did not expect its quality to exceed my expectations. Little pricey too, Needs a little work. In the winter it is nearly impossible to walk barefooted without getting frostbite. More than value for money. BEST BUY by far. Kept me from falling on snow and ice when all my other outdoor footwear did not keep me upright.