iDye Poly Tie Dye Kit - Dyeing fabric has never been easier. iDye comes in a packet that dissolves in hot water - no handling of messy dye powders. You can use iDye for natural fibres in the washing machine or on the stove top. Just throw the dye packet in, add salt (or vinegar for silk and wool fabric) and run through the wash cycle. The ultimate way to get gorgeous colour! iDye comes in 14g packets that will dye 1.3kg of dry fabric. Range of 30 vibrant colours for natural fabrics. Use iDye for 100 percent natural fibre, which include silk, cotton, linen and wool. Not all natural fibres are created equal. Results will vary depending on type of fabric.