The Okarma OK10 is constructed from 100% certified GOTS and Control Union combed organic cotton single jersey. Side seams. Taped neckline. Twin needle stitching at neck, sleeves and hem. The fabric weight of the OK10 is 180gsm which is classed as heavyweight for a tee shirt. The organic cotton used in the OK10 is grown without the use of harmful pesticides, herbicides, insecticides and defoliants. All dyes are Oekotex and GOTS approved. All packaging is as environmentally friendly as possible, including recycled compostable poly bags and recycled card for swing tags.