FINALLY! An answer to my prayers! I can't even recall how many times I've had this problem. For those of you with boyfriends and(?)/or girlfriends, you all know how awkward it is to cuddle and sleep together with your arms around each other. One of you guys have to be in a position where your arm is tucked under the other person or squished in a weird angle where your circulation is cut off. This design concept by Mehdi Mojtabvi is based on an assembled mattress with horizontal gaps that allow you to slip your arm or feet into the grooves. Problem solved! Sleeping with my love will forever be changed.