Boveda 320g 2-Way Humidity 62% The exceptional physical properties of

The exceptional physical properties of this perlite make it tops in the perlite world for adding porosity to soil and soilless mixes

which allows simple identification of multiple strains of cuttings

The lid is compatible with both sizes

Temperature compensation

A wonderful fertilizer for heavy feeders like corn

Boveda 320g 2-Way Humidity 62% The exceptional physical properties ofBovedas patented 62% humidity control packs regulate moisture content, keeping the contents of your containers at the perfect desired level. They dont need any activation or maintenance. Just place them in an airtight container with your items and Boveda technology will do the rest. Only Boveda responds to any atmospheric humidity conditions inside a container by adding or absorbing moisture as needed to maintain the predetermined relative humidity