Our FR Primo collection delivers on-the-job protection using premium, inherently flame-resistant materials. This baselayer gives you room to move with thoughtfully placed seams and an extra-long back hem. We also added permanent odor-resistance so you'll stay fresh, longer. FR Primo 1/4 Zip Baselayer | Men's Flame-Resistant Primo 1/4 Zip Baselayer in Heather Grey Modacrylic/Lyocell/Twaron, Size: XL-T by Ariat