Table II. Sock performance requirement

Table II. Sock performance requirement
Characteristic
Requirement
Test method
12481051095481353261109548Fiber analysis, percent 1/, 2/

Wool (minimum) (see 3.2)

AATCC TM20

Nylon (minimum)

Spandex (minimum)

Thickness, sole area (single ply), inch at

0.15 pounds per square inch (psi)

0.16 to 0.20

ASTM D1777

Bursting strength, sock heel, pounds force (lbf) (minimum)

ASTM D6797

Dimensional stability, percent (maximum)

See 3.5.1
Length: foot and leg; each

Width: foot and calf; each

Elastic recovery, top cuff opening, percent after one hour (minimum) See 3.5.2
Graduated compression, millimeters of mercury (mmHg)

Graduated compression at ankle, average

8 to 15

See 3.5.3
2272614110819Graduated compression at calf, percent 3/

65 to 85

See 3.5.3
Vertical wicking, inches, after 30 minutes, after 3 launderings (minimum) Launder per AATCC TM150, 1, IV, Ai, three cycles, where no detergent is added to the 3rd cycle (see 3.5.4).

TABLE II. Sock performance requirements – Continued.

Characteristic
Requirement
Test method
Colorfastness, rating (minimum)
All except black
Black

Laundering, accelerated

AATCC TM61, 1A, five cycles
Shade change

AATCC EP1

Staining

AATCC EP2

Perspiration

AATCC TM15

Shade change

AATCC EP1

Crocking, dry and wet

AATCC TM8 AATCC EP8

Appearance after repeated launderings

Color change

Launder per AATCC 150, 1, IV, Ai, 25 and 50 cycles, where no detergent is added at each 5th cycle. Color change per AATCC EP9
After 25 cycles (minimum)
Rating 4, no color streaking

After 50 cycles (minimum)
Rating 3, no color streaking

Pilling, rating (minimum)

ASTM D3512/D3512M

After 25 cycles (minimum)

After 50 cycles, (minimum)

FOOTNOTES:

1874521584441/The final fiber content shall add up to 100 percent and consist of only wool, nylon, and spandex. 1874521355842/Cotton and rayon shall not be used in the sock. 1874521336793/Percent of the actual measured average ankle compression. 4/ Pilling testing shall be performed on the heel gore and toe sections only.