The Radians FRS-002 VolCore™ Long Sleeve Cotton Henley FR Shirt reduces burn injuries with FR fabric. Flame-resistant (FR) VolCore™ workwear helps protect workers from short-term thermal incidents because it self-extinguishes and doesn’t melt when exposed to flame. Each UL certified piece in the line has been crafted with durable materials to keep workers safe, comfortable, and compliant.