Flamestretch® Sock System (FR)

Donned primarily by cold-water rescue divers, the Flamestretch Sock System is designed to be worn under dry suits when warmth and FR protection is critical.
The Flamestretch® sock system is comprised of two socks. The inner sock liner by Darn Tough® Wool is low-profile, comfortable, provides excellent moisture management, and is warm when wet. The over-sock constructed with Massif Flamestretch fabric is highly breathable and traps heat to keep your feet warm in the harshest conditions.
  • Full flame-resistant construction with proprietary Massif® fabric
  • High warmth to weight ratio
  • Warm when wet
  • Excellent moisture management
  • Design to work with Massif® Fire and Ice™ layering system
  • All fabrics pass the stringent ASTM D6413/F2302 performance specification for flame resistance.
Men's Sizing Information (inches)
XS S M L XL XXL XXXL
NECK 13-13.5 14-14.5 15-15.5 16-16.5 17-17.5 18-18.5 19-19.5
CHEST 30-33 34-37 38-41 42-45 46-49 50-53 54-57
CENTERBACK ARM - short 29.5-30.5 30.5-31.5 31.5-32 32-33 33-33.5 33.5-34.5 34.5-35
CENTERBACK ARM - regular 31-32 32-33 33-33.5 33.5-34.5 34.5-35 35-36 36-36.5
CENTERBACK ARM - long 32.5-33.5 33.5-34.5 34.5-35 35-36 36-36.5 36.5-37.5 37.5-38
WAIST 25-27 28-31 32-35 36-39 40-44 45-49 50-56
INSEAM - short 30 30 30 30 30 30 30
INSEAM - regular 32 32 32 32 32 32 32
INSEAM - long 34 34 34 34 34 34 34

All measurements are in inches. The measurements provided refer to body size, not to garment dimensions. Size up if you are between measurements. Inseam will vary depending on the style; unless otherwise noted, they will match the chart above. Refer to the Measurement Guide for instructions on how to find your measurements.

Men's Sizing Information (centimeters)
XS S M L XL XXL XXXL
NECK 34 36 38 40 44 46 48
CHEST 84 94 104 114 124 134 144
CENTERBACK ARM - short 76 78 80 82 84 86 88
CENTERBACK ARM - regular 80 82 84 86 88 90 92
CENTERBACK ARM - long 84 88 92 96 100 104 108
WAIST 64 74 84 94 109 119 135
INSEAM - short 76 76 76 76 76 76 76
INSEAM - regular 81 81 81 81 81 81 81
INSEAM - long 86 86 86 86 86 86 86

All measurements are in centimeters. The measurements provided refer to body size, not to garment dimensions. Size up if you are between measurements. Inseam will vary depending on the style; unless otherwise noted, they will match the chart above. Refer to the Measurement Guide for instructions on how to find your measurements.

Women's Sizing Information (inches)
XS S M L XL XXL XXXL
NECK 12.5-13 13-13.5 13.5-14 14-14.5 15-15.5 16-16.5 17-17.5
CHEST 32-33 34-35 36-37 38-41 42-44 45-48 49-52
CENTERBACK ARM - short 28.75 29 29.25 29.5 29.75 30 31.25
CENTERBACK ARM - regular 30.25 30.5 30.75 31 31.25 31.5 32.75
CENTERBACK ARM - long 31.75 32 32.25 32.5 32.75 33 34.25
WAIST 26-27 28 29-31 32-35 36-39 40-42 43-45
INSEAM - short 30 30 30 30 30 30 30
INSEAM - regular 32 32 32 32 32 32 32
INSEAM - long 34 34 34 34 34 34 34

All measurements are in inches. The measurements provided refer to body size, not to garment dimensions. Size up if you are between measurements. Inseam will vary depending on the style; unless otherwise noted, they will match the chart above. Refer to the Measurement Guide for instructions on how to find your measurements.

Women's Sizing Information (centimeters)
XS S M L XL XXL XXXL
NECK 31-33 34 35 36 38-39 40-42 43-45
CHEST 81-84 86-89 91-94 96-104 106-112 114-122 125-132
CENTERBACK ARM - short 73 73.5 74 75 75.5 76 78
CENTERBACK ARM - regular 76.5 77.5 78 79 79.5 80 82
CENTERBACK ARM - long 80.5 81 82 82.5 83 84 86
WAIST 66-68 71 73-79 81-89 91-99 101-106 109-114
INSEAM - short 76 76 76 76 76 76 76
INSEAM - regular 81 81 81 81 81 81 81
INSEAM - long 86 86 86 86 86 86 86

All measurements are in centimeters. The measurements provided refer to body size, not to garment dimensions. Size up if you are between measurements. Inseam will vary depending on the style; unless otherwise noted, they will match the chart above. Refer to the Measurement Guide for instructions on how to find your measurements.

Glove Sizing Information
XXS/5 XS/6 S/7 M/8 L/9 XL/10 2XL/11 3XL/12 4XL/13
Hand Width - inches 6.5 7 7.5 8 8.5 8.75 9 9.5 10
Hand Width - cm 17 18 19 20 21 22 23 24 25
Hand Length - inches 7 7.75 8 8.5 9.25 9.5 9.75 10 10.25
Hand Length - cm 18 20 21 22 24 24.5 25 25.5 26

The measurements provided refer to body size, not to garment dimensions. Size up if you are between measurements. For Hand Width measure around the widest part of the palm above the thumb. For Hand Length measure from the top of the middle finger straight down to the wrist joint.

Headwear Sizing Information
S/M L/X
Head Circumference - inches 21-23 23-25
Head Circumference - cm 53-58 58-63

The measurements provided refer to body size, not to garment dimensions. Size up if you are between measurements. For Head Circumference measure around the head above the ear.

Measurement Guide

Take your measurements over your basic undergarments normally worn. Stand erect without shoes with your feet shoulder width apart. For circumference measurements, make sure to keep the tape measure parallel to the floor.

Find your measurements following the directions below and refer to the size chart to determine the size to order. Do not size up or down. Our garments are designed to fit according to the specified end use and take into account other layering requirements.