SOL Slim Rescue Howler Whistles - Pack of 2 0140-0010 (2 Pack)from £8.99 up to £10.99 Compare prices2→Perfect to keep in rucksacks, the Slim Rescue Howler Whistles from SOL offer a pea-less design and have a volume of 100dB. Only weighing a few grams it's a must-have accessory for an added layer of sa more→fety when venturing out.
