Ergopouchs Warm Weight Bamboo Fleece Pyjamas are made for warm, dry sleeping when temperatures drop ideal for winter. Like all Ergopouch sleep products, they are designed to help kids sleep better. Bamboo is naturally super soft, hypo allergenic, antibacterial, anti-fungal and antistatic it's eco friendly and ideal for sensitive skin. Bamboo keeps kids warmer when it's cool and cooler when it's hot.