Made of waterproof material and welded joints to ensure 100% waterproofingThe available space is large enough, which can be expanded from 30L to 35LEquipped with three pockets that are spacious enough to quickly access small itemsEquipped with a detachable laptop bag that supports up to 14" laptopThickened breathable padded back and shoulder straps reduce back pressure and make you feel more comfortableAdjustable waist strap and sternum strap to fit your body betterThe shoulder belt with reflective stripes to improve the nighttime safetyAvailable in three different functional modes, ideal for commuting, camping, hiking, kayaking, surfing and other outdoor sports