Praised for a perfect fit on the heel. These booties are seamless so they stay on your baby's tiny feet! Size 0-9 months: 9.5cm length, 6cm width Material: 100% extra fine Italian merino wool (oeko-tex, mulesing free) Merino wool doesn't itch and is antibacterial, therefore perfect for babies with eczema or sensitive skin It is not necessary to wash merino wool frequently, as this fiber is self-cleaning. Perfect to just air outside, otherwise very gentle hand wash with lukewarm water of MAX.30° Use a wool detergent to wash Machine wash only on a WOOLPROGRAM 20° and low speed at your own risk as we cannot guarantee the individual program settings on all washing machines Made in Belgium Because of baby's moving feet, pilling will occur the first few wears. This pilling will stop after several wears.