Dry Feather Moss, 10 Square Feet per case also called Fern Moss, green sheet moss: Feather-moss ALSO called Fern Moss has the unique characteristic of what looks like green feathers. These can range form small 1-inch feathers to jumbo 3-inch goose feathers. This moss ranges in color from a light spring-green to a lush olive green. Feather moss is by far the most unique of any of our moss. Dried Feather Moss comes in sheets that range from 6 in. to 2 feet wide. This is untreated all-natural moss, shipped directly to the customer. Has a shelf life of 3 to 4 weeks if kept refrigerated. Box size 24x12x4. Average 10 square feet of moss. Sheet moss.