• Blaklader FR Thermobroek Merino 1889-1075 (9900 Zwart) 1
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Blaklader

Blaklader FR Long Johns 78% Merino Inherent 1889-1075

Blaklader FR Long Johns 78% Merino Inherent 1889-1075

1889107-S-ZW

€79,39 EUR excl. VAT
€93,40 EUR €79,39 EUR excl. VAT
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Delivery time: Expected 01-09-25

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

If you're working in environments where flame protection matters, these thermal long johns deliver serious performance without compromising on comfort. The Blaklader FR Long Johns combine inherently flame retardant merino wool with modacrylic fibres to create underpants that work hard across both indoor and outdoor settings. The merino interlock construction offers genuine heat retention in wet and dry conditions alike, whilst the elastic waist and contrast-stitched seams keep everything secure during your working day. Built to withstand fine washing up to 60°C, this thermal underwear is designed for professionals who demand quality without cutting corners on safety.

Key Features

  • Inherently flame retardant merino wool blend construction
  • Arc rated protection against electrical hazards and thermal exposure
  • Elastic waist for secure, comfortable fit throughout your shift
  • Contrast-stitched seams visible on external leg openings
  • Fine washable up to 60°C for easy maintenance

Recommendations from our Unishore Expert

These long johns are engineered for those working where thermal protection is non-negotiable. The merino wool content naturally manages temperature regulation, keeping you warm when conditions turn wet without the bulk of traditional thermal wear. If you're regularly exposed to arc flash hazards or working near open flames, this thermal underwear meets stringent international safety standards to keep you protected. The elasticated leg openings and waist ensure consistent comfort during long shifts, whilst the robust fabric weight of 225 g/m² delivers durability season after season. Layer these beneath your workwear for reliable baselayer performance in demanding industrial environments.

Product Features

  • Composition - 78% merino wool, 20% modacrylic, 2% other fibres
  • Fabric Type - Merino interlock, flame retardant, antistatic
  • Weight - 225 g/m²
  • Arc Rating - 7.3 cal/cm²
  • Waist - Elasticated
  • Leg Opening - Elasticated with contrast-stitched seams
  • Leg Length - Full length thermal underpants
  • Article Number - 1889-1075

Standards and Safety

  • Protection against surface-area flames and thermal radiation EN ISO 11612 A1, B1, C1
  • Electric arc protection at Class 1 level against thermal hazards IEC 61482-2
  • Static electricity dissipation properties for safe electrical environments EN 1149-5

Characteristics

Features of the Blaklader FR Long Underpants 78% Merino 1889-1075:

  • Elastic border in trouser leg opening
  • Seams in contrasting colors
  • EBT 7.3 cal/cm2, HAF: 78.6%
  • Elastic waist
  • Certification labels on outside
  • 78% merino wool, 20% modacrylic , 2% other fibers, merino interlock, flame retardant, antistatic, 225 g/m2, ATPV 7.3 cal/cm2
  • EBT 7.3 cal/cm2, HAF: 78.6%
  • EN ISO 11612 A1, B1, C1
  • IEC 61482-2, class 1
  • EN 1149-5

  • Flame retardant material (EN 14116)

Material & washing instructions

78% Merino wool, 20% modacrylic, 2% other fibers, Merino interlock, flame retardant, antistatic, 225 g/m2, Arc rating 7.3 cal/cm (225 g/m2)

Size chart

The table below is the official Blaklader size chart, you can use this as a reference to determine which size you need for Blaklader clothing. For trousers use the waist and inner leg length, for overalls the chest circumference is also important.

Please note: we recommend trying on before personalization, no complaints can be made based on the size chart

*All lengths in centimeters unless otherwise stated
**Information based on size chart from the Blaklader Catalogue, this may vary per model
***If you wish to personalize your clothing, we always advise you to try it on first

Mate A. Chest circumference B. Size C. Hip circumference D. Inseam length
XS 84 72 88 77
S 92 80 96 79
M 100 88 104 81
L 104 92 108 82
XL 112 102 116 84
XXL 116 107 120 84
3XL 124 117 128 85
4XL 128 122 132 85
5XL 136 134 142 85
6XL 140 140 147 85

Sizes of shortened and extended version available on some models.

Mate Inner leg length for short version Inner leg length for longer version
XXS 73
XS 74
S 75 83
M 77 85
L 78 86
XL 79 87
XXL 80 88
3XL 81 89
4XL 81 89
Measuring instructions Blaklader

About Unishore Workwear

Unishore Workwear has been a specialist in workwear and personal protective equipment since 1985. We offer:

  • Fast delivery
  • Competitive prices
  • Embroidery and printing in-house
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