Under Armour Thermal 2.0 Crew - Men'sThe Under Armour Thermal 2.0 Crew features a waffle knit texture that traps heat for superior warmth. Rib details at the collar and cuff. Ergonomically shaped hem. Anti-odor technology, regular fit. AllSeasonGear® technology is best for weather between 55 degrees and 75 degrees. 97% polyester/3% spandex. Imported.