Maxigard, premium gray foam nitrile, over knuckle coated, grey dyneema, xl features: washable, resistant to chemicals, water and ultraviolet light seamless construction color coded cuff overedge for easy size identification contains no stainless steel fibers dyneema is a brand of polyethylene fibers that are 10 to 15 times stronger than steel, more durable than polyester and a strength that is 40% greater than aramid fiber sold in 12 pairs per dozen, priced per dozen.