NOTE: item received for free through the Vine programI ordered this mask to replace my previous mask, which has become a little worse for the wear. I love lavender scents and thought the claimed "100% light-blocking" functionality would be great to help me get to sleep. While the lavender scent is quite nice - and storing the mask in the included mask can help preserve the scent - this mask really doesn't do a great job at blocking out light, and it certainly doesn't live up to its claim of "100% light-blocking." The bottom of the mask includes has small flaps that are somewhat adjustable, though I wasn't able to get them adjusted to be truly light-blocking. That said, the mask is cushioned and relatively thick, so it does a decent job at blocking out ambient light - just not completely. The elastic strap is adjustable, but it's not covered in a soft or comfortable fabric, which I found to be irritating to the skin around my ears where the strap rests on bare skin. Ultimately, I found the mask to not be that comfortable.The included instructions seem to suggest that the mask isn't machine washable - the instructions simply say to "wipe with a damp cloth and air dry." If, like me, you have very oily skin, this is a bit of an issue as it's extremely difficult to actually get the mask clean. I haven't actually tried washing the mask to see what happens, but keep this in mind if you have similar quality skin. You may want to go with a mask that you can actually throw into the washing machine.Overall, this isn't a terrible mask, but I don't think I'll be using it nightly. The incomplete light blocking and the uncomfortable strap make this a bit of deal-breaker for me. This mask is relatively cheap and does look nice, and the lavender scent is a nice touch, but I can't recommend it since it doesn't actually function that well as a sleep mask and is uncomfortable to boot.