Designed with a polyester Sherpa lining and made with cotton twill as the outer shell, this Winterliner has a full head and neck coverage with an extra-long nape and wraparound collar, keeping the heat sealed in and keeping out harsh winds. The Heavy Duty 400 Winterliner provides your staff a bit of extra warmth in cold weather environments; This product is ideal for extremely harsh winters and environments from 0° to -20° F. Designed to be easily worn under caps or hard hats and is shoulder length long, so it can be tucked into your jacket for added protection; This product meets 16 CFR 1610, Class 1.Established in 1933, Jackson Safety has built a century long reputation for delivering the most innovative safety solutions in the welding and personal protective equipment industries. When it comes to providing safety solutions with long-lasting value, durability and comfort, Jackson Safety has set the standard. Whether the need is for welding protection in a steel fabrication environment, head protection on a construction site, or hearing protection at an airport, Jackson Safety provides the widest range of safety choices to meet the needs of every job and every worker.