Tog Rating

This is a measure of thermal resistance of fabric and in effect refers to how good an item is at keeping you warm. It was developed in the 1940s as an easy-to-follow alternative to the SI unit of m2K/W (a tog is 0.1 m2K/W).

The Shirley Togmeter is the standard apparatus for rating thermal resistance of textiles in accordance with British Standard BS5335 (1984).

Sometimes a Clo rating is quoted on clothing instead of a Tog rating. The Clo is equivalent to 1.55 tog.


Wicking Test

This is used as a measure of how well The water transport rate is measured according to a vertical strip wicking test. One end of a strip (25mm wide X 170 mm long) was clamped vertically with the dangling end immersed to about 3 mm in distilled water at 21˚C. The height to which the water was transported along the strip is measured at 1, 5 and 10 minute intervals and reported in centimeters (cm). Higher wicking values show greater liquid water transport ability.