Thermoflo Black & White Premium Poly Grow Media 3" w this self contained package 3" w this self contained package of exceptional products includes everything required to set you on the right course for gardening success Housing: Galvanized Steel patios and walkways to prevent weed growthGreenhouse lighting aid: reflects 90% of light on the white sideFrost prevention on plantsGreenhouse winterizing cover equipment and other clean surfacesExterior scaffold coverRoom separator dividerConcrete curing coverCovering for large materials outside for weather protectionInstant all purpose coverInterior moisture barrier insulator for unprotected windowsPainting drop cloth: use to cover carpets and floorsWaterproof exterior storage coverCamping tent coverSun shield reflects heat (white side)Landscape nursery ground cover for level beds to prevent weedsCover beneath decks