Adjustable bed system

An adjustable bed system comprising:

• a mattress having a head portion and a foot portion rearward of the head portion, wherein the head portion defines a cavity that is downwardly open;
• and
• an adjustment mechanism having a lower base formed of a planar substrate, an upper support formed of either a frame or another planar substrate that is movably coupled to the lower base, and an actuator operable to move the upper support relative to the lower base;
• wherein the adjustment mechanism is positioned in the cavity and coupled to the mattress, and when the actuator is operated, the adjustment mechanism moves the adjustable bed system between a flat configuration in which the head portion is substantially coplanar with the foot portion and an inclined configuration in which the head portion is inclined relative to the foot portion;
• and
• wherein the mattress and the adjustment mechanism are configured to be positioned on a support surface, the adjustment mechanism having a higher coefficient of friction with the support surface than the mattress.