These nautical trunks contains 95% organic cotton, which is both soft and resistant, as well as 5% elastane for support. 

The elastic waistband contains over 60% cotton to give maximum comfort. The label inside the waistband is also made with cotton and does not irritate the skin.

BlueBuck's underwear is 100% made in Europe. The yarn and the fabric are made in Portugal, the elastic waistband comes from Austria, the cotton labels are made in Italy. The final garment is assembled in Portugal.

The factories use renewable energy. They represent 50% of energy needs in Portugal and 75% in Austria.