The grey is a tad darker then shown which is fine because it might fade.  If it doesn't that's fine because its going on the top bunk and it could stand out a bit more then the bottom. The regular twin fits a bit loose on a average twin mattress.  Although the fabric is soft to the touch, it is light weight and see through.  Not sure how it will stand up to normal wear and tire.  

Pros: Soft to touch
Cons: Color isn't true to whats shown/ Material is light weight & see through