a folded sheet of flexible material defining a sling trough for supporting an elbow and a forearm, the sling trough having a first side and a second side, and a proximal end and a distal end;

a first releasable fastener medially attached to the first side of the trough;

a mating second releasable fastener medially attached to the second side of the trough; and

at least one neck strap connected to the trough and forming a loop adapted to fasten behind a neck of a user;

wherein the mating first and second fasteners are adapted to fasten the trough closed about the elbow and forearm when the sling trough is used to support an upper arm, the elbow and the forearm of the user.