Simms Jacket Mens Gray Size M Insulated Full Zip Primaloft Lightweight Fishing. Simms insulated full zip jacket in gray features a lightweight design with Primaloft insulation, making it an ideal choice for fishing and outdoor activities during transitional seasons. Constructed with a durable nylon outer shell and soft polyester lining, this regular-fit piece includes a protective stand-up collar and long sleeves. The solid gray colorway offers a versatile look for winter, fall, or spring wear. Measurements: • Chest: 18" (36" doubled) • Length: 25" #Quilted #Nylon