Read more At Home Outdoors It is with this belief that Jack Wolfskin has been successfully developing functional apparel, equipment and footwear for outdoor activities, travel and leisure since 1981. Whether in the mountains, the wilderness, in faraway countries or in the countryside on your doorstep, Jack Wolfskin offers all the products you need to make you feel right at home in the great outdoors, whatever the weather. Nanuk - Jack Wolfskin's fleece technology Fleece is an easy-care insulation material that effectively draws humidity out in a layering system. Because fleece is not very wind-resistant, it can be worn with a matching functional jacket if required. Just how warm fleece is depends on the material thickness and type of construction. The material thickness of a fleece is given in grams per square metre (g/m2). The higher the number of grams, the thicker and warmer the fleece is. Numbers in product names, e.g. Nanuk 100, show the material thickness. Material thicknesses at Jack Wolfskin range from Nanuk 100 (g/m²) to Nanuk 400 (g/m²). Read more Nanuk 100 The lightest and thinnest Jack Wolfskin fleece which is used for the Gecko Kids as well as the Sandpiper boys/girls fleece. Nanuk 150 This fleece is commonly used in Jack Wolfskin's 3-in-1 jackets as a lighter insulation layer for spring and fall weather. Example fleece for this category are Polar Bear boys/girls (a mix of Nanuk 150 & 100) as well as the Kirkwood boys/girls. Nanuk 200 The second warmest fleece from Jack Wolfskin is also used for 3-in-1 winter jackets as a warmer insulation layer, but it also works well in cold spring/fall days. Jack Wolfskin product examples are the Kids Thunder Bay as well as the Caribou Lodge Hoodie. Nanuk 300 The warmest Jack Wolfskin fleece makes you feel warm and cozy in cold winter days. Jack Wolfskin offers the warmest fleece technology in the Arctic Wolf boys/girls, the Moose fleece boys/girls as well as the Girld Terra Nova Hoodie. Nanuk 100 Nanuk 150 Nanuk 200 Nanuk 300 (function(f) {var _np=(window.P._namespace("AplusModule"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) { // register javascript with unique module id P.when("jQuery", "AplusModules-module-6", "ready").execute(function($, hoverModule) { hoverModule("aplus-module-6-2"); }); }));