An adjustable bed, comprising: - an articulating support structure having a foot support member with a top surface, a longitudinal edge and lateral edges; - a mattress received on the support structure on the top surface of the foot support member having adjacent longitudinal and lateral edges (22, 23); - a mattress retention system comprising: - a tension web (16, 16b) attached to the top surface of the foot support member of the articulating support structure inset from a longitudinal edge of the foot support member and from lateral edges of the foot support member, and a width of said tension web (16, 16b) extending across only a center portion of an overall width of the foot support member inset from the lateral edges of the foot support member, said tension web (16, 16b) having a first fastener moiety on an extending edge of the tension web (16, 16b); and, - a mating element attached to the bottom surface of the mattress proximate an edge of the mattress to be restrained, said mating element having a second fastener moiety for operable connection to the first fastener moiety, wherein the tension web (16, 16b) is attached to the top surface with a tension strip capturing an attachment edge of the tension web (16, 16b). - an articulating support structure having a foot support member with a top surface, a longitudinal edge and lateral edges; - a mattress received on the support structure on the top surface of the foot support member having adjacent longitudinal and lateral edges (22, 23); - a mattress retention system comprising: - a tension web (16, 16b) attached to the top surface of the foot support member of the articulating support structure inset from a longitudinal edge of the foot support member and from lateral edges of the foot support member, and a width of said tension web (16, 16b) extending across only a center portion of an overall width of the foot support member inset from the lateral edges of the foot support member, said tension web (16, 16b) having a first fastener moiety on an extending edge of the tension web (16, 16b); and, - a mating element attached to the bottom surface of the mattress proximate an edge of the mattress to be restrained, said mating element having a second fastener moiety for operable connection to the first fastener moiety, wherein the tension web (16, 16b) is attached to the top surface with a tension strip capturing an attachment edge of the tension web (16, 16b). - a tension web (16, 16b) attached to the top surface of the foot support member of the articulating support structure inset from a longitudinal edge of the foot support member and from lateral edges of the foot support member, and a width of said tension web (16, 16b) extending across only a center portion of an overall width of the foot support member inset from the lateral edges of the foot support member, said tension web (16, 16b) having a first fastener moiety on an extending edge of the tension web (16, 16b); and, - a mating element attached to the bottom surface of the mattress proximate an edge of the mattress to be restrained, said mating element having a second fastener moiety for operable connection to the first fastener moiety, wherein the tension web (16, 16b) is attached to the top surface with a tension strip capturing an attachment edge of the tension web (16, 16b).