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 14 Zip Baselayer Men's Flame-Resistant Primo 14 Zip Baselayer in Heather Grey, Size: MT by Ariat