Rothco Midweight Thermal Knit Top 3XL 3XL. From the trail to the city this top will keep you warm in the coldest months fall and winter have to offer. The thermaltop is made of a cotton/polyester blend that isperfect for extreme weatherconditions. Matching Midweight Thermal Bottoms from Rothco are also available. Specifications for Rothco Midweight Thermal Knit Top: Manufacturer: Rothco Sleeve Length: Long Age Group: Adults Apparel Fit: Regular Gender: Male Color: Black Shirt Style: Thermal Shirt Fabric/Material: 60percent Cotton 40percent Polyester Knit Condition: New Neckline: Crew Seasonal/Temperature Use: Cold Weather Features of Rothco Midweight Thermal Knit Top Material: Polyester Material Specs: 60percent Cotton 40percent Polyester Knit Package Contents: Rothco Midweight Thermal Knit Top Rothco Midweight Thermal Knit Top 3XL 2829-3XL