When flooring planks are installed on stair treads, a stair nose provides a curved wrap for a smooth and secure finish. The main purpose of stair nosing is to improve the safety of the staircase. The stair nose protrudes a little over the edge of the tread, allowing some extra space for users to place their feet. The decor of the stair nose is designed to coordinate with your 5.5 mm vinyl flooring planks and may be cleaned with a damp cloth. For best results, lay out your moldings in the area where they will be installed before installing the flooring planks so you may choose a plank and transition that coordinate best together to meet your desired look.