Blaklader FR Long Johns 78% Merino Inherent 1889-1075

Blaklader FR Long Johns with 78% Merino Inherent 1889-1075

If you're working in environments where heat and flame are genuine concerns, these long johns deliver the protection and comfort you need. Built from a premium blend of 78% merino wool, 20% modacrylic, and 2% other fibres in a merino interlock construction, this thermal underpant offers inherent flame retardancy that doesn't wash out. The material weighs 225 g/m² and provides an arc rating of 7.3 cal/cm², meeting strict safety standards across multiple certifications. Contrast-coloured seams and elasticated waistbands ensure durability, whilst elastic openings at the leg cuffs deliver a secure fit. Machine wash at 60°C on a delicate cycle to maintain performance. Suitable for both indoor and outdoor work, these underpants work hard whether conditions are wet or dry.

Key Features

• 78% merino wool blend with inherent flame retardancy
• Arc rating 7.3 cal/cm² for thermal protection
• Elasticated waistband and leg cuff openings
• Contrast-coloured seams for durability
• Suitable for wet and dry working conditions

Recommendations from our Unishore Expert

These long johns are engineered for professionals who can't compromise on safety or comfort. The merino wool content naturally regulates your body temperature regardless of weather, keeping you warm when it's cold and managing moisture when you're working hard. The flame retardant properties are built into the fibres themselves, so protection remains intact through repeated washing. With support straps at the waistband and secure elastic at the ankles, movement stays unrestricted during your shift. This is the kind of base layer that performs consistently in high-risk environments where electrical arcs or open flames present a genuine hazard.

Product Features

• Composition - 78% merino wool, 20% modacrylic, 2% other fibres, merino interlock, flame retardant, antistatic, 225 g/m²
• Colour - Black
• Waistband - Elasticated
• Leg cuffs - Elastic openings with contrast-coloured seams
• Item number - 1889-1075

Standards and Safety

• Antistatic protection to EN 1149-5
• Electric arc protection to IEC 61482-2, Class 1
• Flame retardant to EN ISO 11612 A1, B1, C1
• Arc thermal performance rating 7.3 cal/cm²