The construction has aluminum frames where the lower section can move freely to accommodate larger items. Two sets of compression straps will secure your drybag or tent, and attaching and detaching gear is easy thanks to the quick-release camlock buckles. Comes with an extra compression strap for larger loads and is perfect with the Specialized/Fjällräven Seatbag Drybags, 10 or 16 liters. Its compact size (45 x 11 x 20cm) makes it compatible with most frames and wheel clearances. Part of the Specialized/Fjällräven series for urban rides and bikepacking adventures.