out and weighed in the same ways again. To pass, the weight of the samples shouldn’t increase by more than 12%. SRA/SRB/SRC – Slip-resistance of sole: Three tests make up the one rating for slip resistance. Each test is done with a mechanical heel set at a seven-degree angle, which moves to imitate different kinds of slips and falls on different surfaces. If the label shows ‘SRA’, the sole will have passed on a ceramic tile surface treated with diluted soap. ‘SRB’ means it passed on a steel floor treated with glycerol. ‘SRC’ means the boot passed both tests. B – Breathability of uppers: If a CE label has the letter B on it, it means the boot has gone through an optional test to check that moisture vapour can escape. WR – Water absorption/desorption of inner: The boots are tested to see how much water the insides hold and how much they release. If the boots pass this test, ‘WAD’ will be displayed on the label. See also Outline of motorcycles and motorcycling References