Unique in its composition and is manufactured with extra washes to remove excess sodium. Made from ½" double sieved coir fibers for increased air space to the root zone, the fiber is aged 18 to 24 months and is fully decomposed to ensure no P.H. or E.C. drifts. Coarse coir fiber mat on the bottom of the block allows for free drainage and keeps coir fiber particles from draining out of the bag. Compressed in a 5 to 1 ratio and available in 6" X 6", 8" X 8", or 10" X 10" bags. Wrapped in a horticultural grade poly bag that is white on the outside and black on the inside to insure a low temperature and no light promoting healthy root systems. Just open the top of the bag and hydrate the coir, BOSS will expand to full size in just minutes.