A uniformly blended mixture of portland cement and graded aggregates specially, packaged in an environmentally friendly, biodegradable bag. Place flat, overlapped or stacked along embankments, slopes, drainage ditches and storm sewers for stormwater and erosion control. Biodegradable package weathers and degrades over time to reveal a solid, durable and attractive “cobblestone” tiered barrier with high structural integrity. Ideal for constructing retaining walls, garden walls, garden paths or other landscaping applications. Easy to use; requires no forms, mixing or finishing.