The Colonial Mills Ridgevale Stair Tread - Whipple Blue features shades of blue with hints of yellow. The pieces in the Ridgevale Collection are constructed of 100% wool material and are made in the USA using classic flat braid construction for durability. Each piece showcases a strong braided design that will protect your floors from nicks and scratches for years to come. These treads are available alone or in a set of 13. Caring for your Colonial Mills Rug: Retain the beauty of your rug with regular vacuuming using the hard-surface attachment of your vacuum. Remove spots with any dry-cleaning fluid. Periodic professional dry cleaning is recommended. Colonial Mills The resurgent popularity of braided texture comes as no surprise to Colonial Mills Inc. (CMI). For the past several years CMI has developed new colors and styles that will capture the home decorating imagination of just about anyone