- Quick Duck®: 8.5-ounce, 88% cotton/12% nylon; 20% lighter but just as warm as heavier outerwear; insulated with 150g 3M™ Thinsulate™ Platinum Insulation FR - Rain Defender® durable water repellent - Mighty Back™ bi-swing between shoulders for instant recovery - Flex Elbow™ for less restriction; internal rib knit storm cuffs with ergonomic shaped sleeve hem - Sleeve-riding-up prevention in the form of an underarm Freedom Gusset™ - Brass zipper front with Nomex® FR zipper-tape plus inside and outside protective flaps and snap closure for electric-arc protection; meets the performance requirements of NFPA 70E and is UL® C