Made from 100 % FR cotton The Strongarm American Welding Companies welding sleeve is perfect for use in welding, maintenance, metal fabrication and the steel industry. Treated for Spark and Fire Repellence for exceptional FR protection while allowing for breathability in warmer climates. Closed elastic at both ends keeps the sleeves in place and prevents sparks from seeping through offering maximum coverage. Wilde closed ended elastic at both ends keeps sleeve in place while adding comfort for longer wear-ability. Made of 9-ounce light weigh enhanced flame-resistant cotton, the flame-resistant effect is as good as other welding sleeves made of 15-ounce but is much more comfortable and breathable.