Founder and current president Heartmoot Oltree, was founded in 1981 in the experience of heavily rained clothes and food getting wet during bicycle trips in 1982, the company was founded at a mere 20 years old and developed a fully waterproof cycle sideback, and started production "Ultreve" a variety of products originated from his development policy. They go through the revolutionary adapter system and waterproof zippers "TI ZIP". We have continued to produce aggressively until the present day, while repeatedly testing the product to demonstrate the functionality and durability of high quality and reliability. Seat post bag with roll closure Lightweight and can be mounted with rear lights. Available in two sizes Small and Medium