70% Organic merino wool and 30% mulberry silk makes a perfect fibre blend for extra sensitive skins. This is our favourite all-year-round wool fibre blend. The silk adds an extra soothing and cooling property that makes it perfect for both hot and cold weather. The temperature regulating quality of this merino/silk blend is enhanced and helps keep you and your child cool and non-sweaty in the heat and warm in the cold. Engel's fine-rib wool/silk blend is approx 190gsm in weight.