1. 100% Cotton 2. 100% Cotton Made:2 Soft Cotton Structure Ultra Soft & Breathable For Long-Time Wearing. 3. Double Layer Fr:2 Layers Flame Resistant, Not Every Welding Cap Is Fr Test,Complies With Nfpa 70e For Arc Flash And Nfpa 2112 For Flash Fire. Arc Flash Rating (Atpv) Is 12 Cal/Cm2 + 12 Cal/Cm2. 4. The Comfort Fit:9 Available Sizes. Fits Your Head Circumference Comfortable Better Than One Size Fits All,Better Performance On Neck Protection As Well As Ensuring The Level Surface. 5. Reversible design:Innovative Reversible Unlike the common style, it is available to wear it inside out. 6. 4/6 Panel Design:No Unicorn Peak,Fit Your Head Better.Unparalleled Stitch Workmanship.