Abstract: The highly stretchable, seamless sock conforms to the underlying portion of the body when donned so that there are no undesirable wrinkles or thicknesses in fabric (e.g., ribs, seams, etc) which might cause focal pressure on the foot or leg. The sock comprises a receptacle having an open upper end an opposite, closed toe end. The receptacle includes a toe section that projects from the toe end and is configured to receive the toes of the wearer, a leg section that is adjacent the leg end and is dimensioned to receive at least a portion of the leg of the wearer, a foot section extending between the leg section and toe section of the receptacle, and a heel section extending partly around the circumference of the receptacle between the foot and leg sections. These sections of the receptacle are knitted of a common high-stretch corespun yarn and are configured to cause the yarn to stretch when the sock is donned.