Outdoor rugs make great additions for home decorators hoping to add a splash of color to their verdant scenery. A well-positioned rug can designate an area for lively entertainment by framing an area for play. While natural fiber rugs may seem like a good choice for the outdoors, consider that most natural fibers beside seagrass are absorbent of both odors and moisture which can result in mildew and mold growing over time. Synthetics may not have the unrefined beauty of natural fibers, but these offerings are durable and affordable.