pushchairs and car seats fabrics also,such as the main hug, usually cotton is not . Makes babies sweat when used for a long time. When the dirty washing is not practical. Sevi baby stroller and car seat with a seat belt made from cotton fabric bones on the cushion,ergonomic cushion is. The structure reduces the sweating with cotton.They're dirty and is easily washed. Sevi baby stroller and car seat cushion ergonomic structure in the head section of the baby's head prevents slipping of the left and right.