These quality infant shoulder lap tee's are 100% cotton. We dye them using the industry standard fiber reactive dye. This ensures a permanent bond of the color to the fabric. Each baby t-shirt is prewashed and hand tied with a wax coated string, then dyed in the vibrant patterns seen below. Truely handmade tie dye. Sizes: new born, 6 month, 12 month, 18 month and sometimes we have 24 month.