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 unique advantage is that it remains effective in moisture and still provides warmth even when wet. The footbox features additional filling to keep sensitive little feet especially warm. Softtouch Polyester 50D: This outer cover of the sleeping bag is soft yet durable. The 50D polyester taffeta fabric, with and without grid embossing, is made from densely woven 100% polyester. Softtouch Pongee 50D: This inner lining of the Microguard sleeping bags is a lightweight alternative to cotton or polycotton. This fabric, made from 100% polyester, is skin-friendly and quick-drying. Microguard: A unique combination of different fibers and their functions. Microfine fibers (MICRO) act as heat storage, while stable spiral fibers (GUARD) provide stability and loft, thermally processed into a soft yet robust composite.