Portwest
MF101 - Bizflame FR Class D/N Shirt

SPECIAL
Expires 30 November, 2025
Measuring Instuctions (Guide Only)
This guide explains the different terms used in garment size guides and shows you how to take your own measurements when choosing your fit.
Please Note: This is a general guide only, please refer to specific sizing instructions for your desired garment in the product descriptions section or style sheet.
If you would like to share feedback about this page, please contact us directly via the link below: Ask us about sizing
Tops
T-Shirts, Shirts, Blouses, Sweaters/Jumpers, Hoodies, Cardigans, Polos, Tunics, Crop Tops, Tank Tops/Singlets, Camisoles, Vests, Tube Tops, Bodysuits, Activewear Tops
How to Measure Half Chest (Garment Measurement) for tops
The "half chest" measurement is taken directly from the garment itself, not your body. It's a key indicator of how wide a top will be. A top's "half chest" measurement is taken when laid on a flat surface and measured arm pit to arm pit.
What you'll need:
- A top you want to measure (e.g., a t-shirt, shirt, or jumper)
- A measuring tape (cloth or flexible metal)
- A flat surface (e.g., a table or clean floor)
Instructions:
-
Lay the Garment Flat:
- Place the top flat on a clean, hard, and even surface.
- Smooth out any wrinkles or creases, ensuring the front and back layers are perfectly aligned and not bunched up.
-
Locate the Armpit Seams:
- Identify where the sleeve seam meets the main body of the top, directly under the armpit. These are your starting and ending points.
-
Measure Across:
- Take your measuring tape.
- Place one end of the tape precisely at the point where the armpit seam starts on one side of the top.
- Stretch the tape straight across the front of the top, ensuring it remains flat and horizontal.
- Read the measurement at the point where the armpit seam starts on the opposite side.
-
Record the Measurement:
- This figure is your "half chest" measurement.
Half Chest Measurement Diagram
Lowers
Trousers, Pants, Jeans, Shorts, Skirts, Leggings, Jeggings, Capris, Culottes, Track Pants, Cargo Pants, Chinos, Boardshorts, Swim Shorts.
What's a Half Waist Measurement?
Put simply, a half waist measurement is half the circumference of your waist. Instead of measuring all the way around, you're measuring from one side of the waist to the other when the garment is laid flat.
How to Take a Half Waist Measurement (Step-by-Step)
You'll take this measurement on a garment, not on a person. Here's how you do it:
What you'll need:
- A flat surface (a table or clean floor works a treat)
- A measuring tape (cloth or flexible metal)
Steps:
- Grab your Garment: Lay the garment you want to measure (trousers, skirt, shorts, etc.) flat on your clean, smooth surface.
- Smooth it Out: Make sure there are no wrinkles, puckers, or folds in the waistband. You want it as flat and even as possible, just like it would sit when worn.
- Locate the Waistband: Identify the top edge of the waistband. This is the part that would sit around your natural waist or where the garment is designed to sit on your body.
- Align Your Tape: Place one end of your fabric measuring tape at one side of the waistband, right at the outer edge. Make sure it's snug against the fabric but not stretching it.
- Measure Across: Run the measuring tape straight across the very top edge of the waistband to the opposite outer edge.
- Read the Measurement: Take your reading. That's your half waist measurement!
Half Waist Measurement Diagram
Description
The Portwest MF101 Bizflame FR Class D/N Shirt delivers certified flame protection for demanding industrial environments. Engineered with Bizflame Work 100% cotton fabric, this shirt combines superior safety with all-day comfort. Features premium flame-resistant reflective tape, contrast panels for enhanced visibility, and UPF 50+ protection blocking 98% of UV rays. Perfect for offshore, welding, and hazardous work environments where reliable protection meets professional performance.
Material
- Bizflame Work 100% Cotton, 185g
- 99% cotton and 1% carbon fibre construction
Features
- Fabric conforms to ARC1 = 5.2cal/cm²
- Premium sew on flame resistant reflective tape
- Contrast panels for protection against dirt
- 100% Cotton fabric for added comfort and breathability
- 2 pockets for secure storage
- Pen division
- 50+ UPF rated fabric to block 98% of UV rays
- Flame retardant closures and trims including flame resistant plastic buttons
- Lumentex flame resistant reflective tape wraps the body and arm
- Tested to a minimum of 60 washes using a normal washing cycle
- Anti-static properties
Safety Standards
- HRC/PPE 1
- ATPV 5.2 CAL
- AS/NZS 4602.1:2011 Class D
- AS 4602.1:2024 Class D/N Level 2
- AS/NZS 1906.4
- AS 4399 (UPF 50+)
- EN ISO 14116 Index 3
Sizes
- S - 5XL
Size Guide
SIZE | S | M | L | XL | 2XL | 3XL | 4XL | 5XL |
---|---|---|---|---|---|---|---|---|
Chest (cm) | 104.75 | 112.25 | 119.75 | 127.25 | 134.75 | 142.25 | 149.75 | 157.25 |
Hem (cm) | 104.75 | 112.25 | 119.75 | 127.25 | 134.75 | 142.25 | 149.75 | 157.25 |
Front length (cm) | 76.25 | 77.75 | 79.25 | 80.75 | 82.25 | 83.75 | 85.25 | 86.75 |
*ALL MEASUREMENTS ARE APPROXIMATE AND ARE FOR REFERENCE ONLY. COLOURS ARE REPRODUCED AS CLOSELY AS PRINTING ALLOWS.
Additional Information
Material: |
Cotton |
Material: |
Cotton Drill |
Material: |
100% Cotton Drill |
Style: |
Shirt |
Safety Class: |
Day/Night |
Safety Class: |
Flame Resistant |
Arc Flash Rating: |
ATPV 5.2 |
Hazard Risk: |
HRC/PPE 1 |
Hazard Risk: |
EN ISO 14116 Index 3 |
UPF Rating: |
UPF 50+ |
Features: |
Anti-static |
Safety Class: |
HRC/PPE 1 |
Safety Class: |
Arc Rated |
Features: |
Breathable |