The Click ARC CARC4 features: Flame retardant, Anti-static, ARC Cargo style trousers. 300gsm 60/40 Modacrylic/cotton blend. Inherently flame retardant. Flame retardant qualities will not diminish during life of garment. Triple stitch construction. 7 belt loop part elastic waistband, double button closure. 2 hip pockets. Rear patch pocket with Velcro closure flap. Large bellows pocket to each leg with Velcro closure flap. Right leg mobile phone pocket with Velcro closure flap. All pocket flaps with Retro-reflective tape feature. Internal knee pad pouches. Large qualifying icons on left leg pocket. EN ISO 13688:2013 - General requirements for protective clothing. EN 1149-3:2004 - Anti Static - Test methods for measurements of charge decay. EN 1149-5:2008 - Anti Static - Material performance and design requirements. EN ISO 11611:2007 (Class 1 A1 A2) - Protective clothing for use in welding. EN ISO 11612:2008 (A1 A2 B1 C1) - Protection against heat and flame. ARC IEC 61482-2:2009 - Performance requirements and design requirements. EN 61482-1-2:2007 (Class 1 = 4kA) - Box Arc testing. EN 61482-1-1:2009 (ATPV = 10.8 Cal/cm2) - Open Arc testing. Short leg: 30", Regular leg: 32", Tall leg: 34"