20227928 Filson Men's Denim Insulated Work Vest A true workhorse, Filson's Denim Insulated Work Vest is built with rugged raw denim and insulated with PrimaLoft Silver. The 14.5-oz. preshrunk raw denim wears like iron and the insulation retains 98% of its warmth even if it gets soaked. All so you can keep warm on with the job no matter the weather, season after season. Classic 4-pocket design includes hand, stow and slotted-utility chest pockets. Drop tail and wool-blend rib-knit collar for added coverage.