You will have to bring warm clothes (trousers, sweaters, socks, enclosed shoes, rain clothes) and light ones (skirts or shorts, t-shirt, open shoes) because weather can change very suddenly in Brittany. You can literally experience all four seasons in one day! Please also take with you working clothes, gloves and shoes in addition to your swimsuit. Bring a sleeping bag for cold weather and an insulated camping mat as nights are sometimes fresh and wet.
Foreigners belonging to the European Union must bring with them a personal EHIC (European Health Insurance Card), and everybody must, in any case, bring their insurance certificate. If health issues happen on the project, volunteers will have to pay for it, and will then be reimbursed once back in their home country.