Karrimor hot rock 30 rucksack the karrimor hot rock 30 rucksack is great for hiking and trekking thanks to the rigid back support and the fform backsystem giving you a comfortable padded shoulder while waist straps give added support and comfort this rucksack has a large tube compartment for all your camping equipment accessed via the top loading flap while a pocket to the top of the compartment allows for a water bladder closes with a drawstring and clipped hood with pocket on the inner