The lightweight 30-liter Transistor backpack is a must-have for every outdoor adventure. Created with versatility and performance in mind, this performance pack has the features of a larger hiking pack in an easy-to-carry size. It’s fully hydration compatible. The Transistor also has dual ice axe and trekking pole attachments and a security pocket with key clip for safety. We added 3D air-mesh ventilation on the back panel for your comfort on the trail. A RECCO® reflector helps you stay safe in the wilderness.