Which running pack should I choose for my next trails? The choice of your running pack, hydration vest or bottle holder is important for successful outings and trail races. Your choice will depend on the distance covered during your trail. We offer a wide choice of sizes between 5L and 30L that can accompany you in your training, ultra, short trails... Need help choosing your pack? You can read our article "how to choose your trail running pack? ". RaidLight offers you a wide range of trail running vests and packs: XP pack, Ultra light pack, responsiv running vest, bottle holder and belts.