Celebrating its 10th anniversary as a best seller, the Peak performance Helium line features an iconic quilt pattern. This vest is incredibly lightweight and easy to pack, with a wind- and water-repellent outer shell and premium 90/10 down insulation that makes it perfect for various outdoor activities. You can wear it as an outer layer or layer it under a shell jacket for extra warmth. We only use down that is responsibly sourced and fully traceable through peaks's our Track My Down program. Additionally, the vest is made from PFC-free recycled polyamide.