Void Mattress

Item #: SCP-4103

Object Class: Safe

Special Containment Procedures: SCP-4103 is to be kept in a small room located in Site-██, located in the United States. Due to SCP-4103's effects being ineffective without contact while sleeping, the mattress is to be kept in a three by three meter room, with a significant amount of extra space. No other objects are to be in SCP-4103's containment area.

Description: SCP-4103 was found lying on the ground, outside of [REDACTED] by Dr. [REDACTED]
in a local yard sale. Initial effects were reported in September 20██ at [REDACTED]. Upon waking up, Dr. [REDACTED] acted peculiarly and the SCP Foundation was contacted by a local civilian to investigate the scene.

SCP-4103 is a white, partially stained mattress which is harmless, but heavily affects the minds of anyone who sleeps, or falls unconscious on it. The victim, after one hour, will be slowly sucked into the mattress. This process takes about 15-30 minutes. It is unknown how deep the mattress is, as all attempts to check were unsuccessful.

After the process is complete, the victim will find themselves in, what is essentially, a pitch black room which is completely empty. SCP-4103 will keep the victim inside this room until waking up, and in this process, the victim will not be able to move, as in a state of sleep paralysis. Upon waking up, the victim will be in the containment chamber, in the real world. The subject cannot remember anything at this time, and will not be able to get their memories back. This includes everything:
thoughts, life memories, information, etc. SCP-500 can reverse these effects, and restore the victim's memories. However, this can only be completed under approximately two hours. Not much else is known about SCP-4103, as it needs further studying.