Abstract: A one-piece elongated member which can be used in combination with a piece of upholstered furniture for stabilizing a slipcover to the furniture, is, or can be formed into a V-shaped structure that has a compressed position for being slid into a flexible crease of the furniture, and an expanded condition for being wedged in the crease. The member is wrapped with a portion of the slipcover. Once the member is wedged into the crease, it securely holds and stabilizes the slipcover in the crease so that it is not removed even with use of the upholstered furniture. The elongated member includes a pair of resilient wings, which are connected to each other at an elongated apex. Each wing has a width between the apex and an outer edge of the wing, which is small in comparison to the length of the member in a direction of elongation.