I'm so sure you'll sleep better that you've got 4 months to try it out and I'll give you a full refund if you don't like it.
Your head isn't attached, it's supported on the sides
Comfortable and secure
Works on trains, planes, buses, and cars
Compact, lightweight, and can be used as a sleep mask
It's up to you to choose the price
If you like the mask, so I can understand its perceived value, you will be able to set its price. This will be anonymous to avoid it seeming like 'encouragement'.
Iterate to create a product that meets your needs
By answering questions like 'What value does the product deliver?' and 'For whom would it be the most valuable?