Recommended by The Lullaby Trust. Minimum weight of child 8lbs 13ozs/4kg. 2.5 Tog rating perfect for rooms of temperatures between 16-20 degrees Celsius. The Wash and Wear twin pack contains two Grobag baby sleep bags in fun unisex designs, one with playful animal characters and one with all over multi-colour shapes. The colours are chalky brights contrasting with natural hues. Save money with the wash and wear twin pack compared to buying two separate Grobags. Wash one while the baby is wearing the other one. Cute and cosy, these printed sleep bags from Grobag are sure to provide a great night's sleep. These bags feature double shoulder poppers and side zips to keep baby snug and secure, and a 2.5 tog rating for warmth in standard room temperatures between 16-20°C, making them ideal for all year round. There are extra underarm poppers on the 0-6 months size. Other features of these multi-award winning Grobags include a high quality YKK zip and a Zip-click® that stops adventurous little ones from opening their zips. Plus, the quick-dry polyester filling ensures comfort and hygiene all night. Made from soft cotton jersey, these bags are machine washable. They are British Safety Standard Approved BS8510:2009. A tog measurement is a European warmth rating: the higher the tog, the warmer the product. Grobag baby sleep bags are available in four tog ratings: 3.5 tog, Cold temperatures - for cold room temperatures of 12-15°C (54-59°F) 2.5 tog, All year round - for standard room temperatures of 16-20°C (61-68°F) 1.0 tog, Summer and daytime naps - warmer weather and in rooms of 21-23°C (69-74°F) 0.5 tog, Holiday and heatwaves - hot weather and very warm rooms of 24-27°C (75-81°F)