I have a big head and it fits like a glove. Literally.
a strap would be nice.
The chain it came with is also a bit large in the S hook area. too much slack and it will disconnect. Tightened it down a tad with some pliers.
An instruction pamphlet would have been a nice touch, as to what different exercises you can preform with it so it gets a 3.

Good quality, light foam on all inner parts of headband,all black,

Makes an excellent home defense weapon as well with a weight attached.