A satin block stripe with a subtle sheen is woven with organic cotton and polyester. OCS certified.From the Pisa Stripes Collection. Two dual-purpose classic stripes are presented in a contemporary palette of complementary colours. Pisa Stretto is woven with 59% organic cotton and polyester. Products certified to the Organic Content Standard contain organically grown content that has been independently verified at each stage of the supply chain, from the farm to the finished product. Organic cotton is produced and certified to organic agricultural standards, which require practices to sustain ecosystems.