Helly Hansen Womens Sirdal Hooded Insulated JacketHelly Hansen Womens Sirdal Hooded Insulated Jacket The Women's Sirdal Hooded Insulated Jacket is made to last. It features ECOLoft Air SR Insulation, which gives the jacket a high performance warmth to weight ratio. The smart synthetic insulation also avoids clumping when wet, unlike traditional down fill. The jacket's lightness and relaxed fit enhance your ability to comfortably move in changing conditions. Plus, the outer fabric is ripstop and built