The twentyfourseven plus 15 daysack from berghaus is a lightweight durable and versatile rucksack that is ideal for day trips out commuting and everyday use this handy little rucksack offers an extremely comfortable wear thanks to its padded adjustable straps the breathability of the flow back system which features vented foam panels and the height adjustable chest strap it is also hydration system compatible has a front bungee with cling on clip that is ideal for storing either your cycle helme