*Main pocket*Twinpeak is a 45 Litre DLX Rucksack from Trespass. This rucksack has water resistant functions, thanks to 420D Polyester Mini Ripstop fabric composition. The rucksack offers airflow system, trekking pole loops , ice axe loops , mesh vending system , hydration pack access. TWINPEAK would not let you down in your next adventure trip. The added contrasting adjustable straps give a bit extra to it. Designed to be functional but also to stand out of the crowd.*Airflow system