Vango are specialists in truly technical gear that is built to last and the boulder 35l rucksack is a prime example of their expertise at work a streamlined design hosts a technical and comfortable airforce back system which actively works to expel excess warmth for a cooling comfort compression straps keep weighty loads stable whilst the adjustable harness ensuring a personalised fit with enough rugged features for hill and mountain hikes the boulder 35l rucksack is built for tough day t