So, remember the ...
Snooz Silky Soft Eye Mask
"An Eye Mask also called a Sleeping Mask is a device typically made from fabric that is intended to cover both eyes, the device has an elasticated strap that holds the mask onto your head. Place the mask over your eyes to induce a state of darkness or block unwanted light".
Well, that's all fine & good & I guess if you just want to crumble it up & stick it in your pocket or purse it doesn't take up much room & that can be done & yes they are quite reasonable, BUT.... I have tried these, and my personal opinion they do kind of slide all over your face when you're sleeping or at least it did to me, but they may be because my hair is long? I don't know, but I am here to tell you of a very cool, efficient and does the job eye mask.
Here's mine (it's so cool)... check it out!