The Grow Up Kids is an innovative synthetic fiber sleeping bag designed for little ones. The summer sleeping bag can be extended for heights up to 140 cm, effectively growing with your child. Jack Wolfskin's powerful Microguard insulation provides excellent thermal performance for moderate climates. Its special advantage is that it remains effective even when wet, keeping warmth even in damp conditions. The footbox features additional filling to keep sensitive little feet particularly warm. The outer fabric of this sleeping bag is soft yet durable. The 50D polyester taffeta fabric, both with and without a grid pattern, is made from densely woven 100% polyester. The inner lining of the Microguard sleeping bags is a lightweight alternative to cotton or polycotton. This 100% polyester fabric is skin-friendly and quick-drying. It features a unique combination of different fibers and their functions. Microfine fibers (MICRO) act as heat reservoirs, while stable spiral fibers (GUARD) provide stability and loft, thermally processed into a soft yet robust composite.