The combination of windproof STORMLOCK fabric and a hydrophobic DOWNFIBER fill keeps out the wind - and keeps you warm. Jack Wolfskin has used durable MICROGUARD synthetic insulation at the shoulders to withstand the pressure exerted by pack straps. The gilet has elasticated panels at the sides. These are made from NANUK DYNAMIC stretch fleece for maximum freedom of movement. Another practical feature: the gilet can be stashed in the stuff sack provided.