F2M rashguards are designed AND manufactured in France. Sustainable, they are made of d’ECONYL® = 100% regenerated nylon ( including ghost nets). They have the maximum UV protection = certified UPF50+ without chemical additives. So you protect yourself from the sun while protecting the marine life. F2M is also a member of 1%fortheplanet and your purchase contributes to the planting of corals. Still not sure? Come and try them on!