The 1kg pack is enough for ten to fifteen luxurious Thalassotherapy treatments, the 3kg for 30 to 50 treatments - softening skin and revitalising bone and muscle, warm sea water bathing aids rapid absorbtion of essential minerals. Coarse unwashed granules approx. 3-5mm, quicker to dissolve than chunks, perfect for sea water bathing, approx; 100-150gms per bath. Perfect for restoring depleted minerals, aches and pains, sports injuries, arthritis, rheumatism and dry skin, eczema, etc.