Nenosené vel XL, dĺžka 74cm, prsia 58cm. Nanuk Ecosphere 300 Fleece fabric Nanuk Ecosphere is the sustainable version of our fleece because it is made of 100 % recycled polyester. Nanuk 300 is a polyester fleece (300gsm), meaning 300 grams per square metre and ultimately indicates excellent insulating properties. Our fleece is generally breathable and quick-drying. Nanuk means polar bear in the Inuit language and is fleece technology developed exclusively by JACK WOLFSKIN.