Details  NATTWARM™ fabric: 38% merino wool, 56% Lyocell from eucalyptus and 6% elastane/ spandex. 100% traceable, mulesing-free NATIVA™ merino wool Flat ergonomic seams and slightly front placed side seams mean that you have a minimum of friction at night. Tagless design, all care instructions are printed in the merino pajamas pants. Care  Wash in up to 30 degrees Celsius. Do not tumble dry. Do not bleach. You can also find the care instructions printed on the inside of your garment. Learn to care for super-fine natural fibres in our care guide.