The OTSO Soft Flask is foldable and has a capacity of up to 350 ml. It complies with all the safety regulations for the consumption of the liquids deposited inside. Very easy to use, it is equipped with a bite valve. A simple suction ensures a sufficient liquid supply each time you want to drink. Being foldable, it requires very little space and can therefore be stored anywhere in sports equipment. Durable and leakproof thanks to its valve system. It is ideal for outdoor sports: trail running, running, climbing, trekking, skimo, mountain bike.