They are made from 100% pure cotton so they can wear them all day and be comfortable. They have a stretch cotton material so they move with you and are breathable. This makes them perfect for playing sport or just lounging around in them. They are very durable and wash well. The elastic waist is nylon/elastane so they give you the perfect snug feel around the waist without the elastic digging into you. Every little girl would love to have these as they are so colourful and fun. These briefs are official Tradie brand. Fabric: 100% Cotton Elastic: Nylon/Elastane