Partac Peat Corporation is the manufacturer of the Beam Clay product line of infield surfacing materials. BEAM CLAY is the brand of infield materials that have been recognized as the standard of excellence for baseball and softball infields for many years. We have supplied over 150 Major and Minor League Baseball teams across the country. The NY Yankees, for instance, have played on BEAM CLAY, as it has evolved over the years, since 1952 and the infield at the new Yankee Stadium is BEAM CLAY Baseball Diamond Mix - Pro Premium. BEAM CLAY infield materials are designed for the non-turf areas on which the majority of the game of baseball is played: A. Infield Mix (firm yet soft) for the base paths, arc from 1st to 3rd, and home plate circle; B. Pitchers Mound Clay (extra firm) for pitchers mounds and batters/catchers boxes, and Home Plate Clay (medium firm) for batters and catchers boxes that do not get covered in rain; and C. Warning Track Mix (firm yet crunchy) for warning tracks. BEAM CLAY Infield Mixes (BEAM CLAY Baseball Diamond Mix - Original Premium, Pro Premium, Medium, Medium Pro, Lite, Red Pro, Red Premium, and Red Medium) are manufactured with our special binding process from all natural materials: 1.) Uniform sand (medium to coarse) for excellent drainage, and 2.) Sufficient clay for the desired degree of firmness, moisture retention, and color. 3.) Very little fine/very fine sands and silt, which plug up drainage and which separate, become dusty, and cause wind and water erosion. 4.) All natural materials no dyes! We keep fine/very fine sands and silt to a minimum. These are what many lower grade infield mixes are primarily made from and what we keep to a minimum in our infield mixes. While our spec allows 0-10% silt, we keep silt as low as possible, generally around 3-4%.