The Blackfell 4 25L medium-sized backpack from Regatta is perfect for hikes. The lightweight but durable polyamide ripstop provides lasting wear and the water-repellent finish keeps your items safe. The Tecfoam padding and air mesh fabric and ventilating channels enhance breathability to keep you fresh on the go. You'll easily stay hydrated with the convenient internal hydration storage pocket with a drinking tube retainer. The adjustable chest strap, side compression straps and low-ergonomic shoulder straps ensure a comfortable fit. Whatsmore, the backpack features an Adjustfit carry system that allows for back length adjustment from 43cm to 50cm. The integrated emergency whistle and reflective details keep you safe. The hiking rucksack is finished with walking pole loops.High tenacity lightweight 210d polyamide ripstop 600D lightweight abrasion resistant polyester ADJUSTFIT adjustable carry system for a personalised fit TECFOAM performance comfort STREAMAIR ventilating channels ISOFLEX fabric for expanding storage ISOVENT performance air mesh ADJUSTFIT carry system enables back length adjustment from 43cm to 50cm PFC free durable water repellent finish Internal hydration storage pocket and drinking tube retainer Wide, dual zip opening panel access to main compartment Large zipped front pocket ISOFLEX expanding front and side pockets Adjustable padded hip belt Adjustable load lifter straps Side compression straps to adapt load Adjustable chest strap with emergency whistle Detachable raincover Reflective detail to provide high visability Walking pole loops Made with recycled content