Polyester is weather resistant and durable choice for cords. Polyester fiber doesn't absorb much water and the cord length is not affacted by moisture. Polyester (best when black) stands well against UV radiation aka sun light.
0.90 €/m Edelrid PES Cord 4 to 6 mm The PES CORD combines high abrasion resistance, low elongation, and excellent knotability. Available in: 5 colors, 4 mm, 5 mm and 6 mm
0.40 €/m Minicord 275 Type I Polyester Cord 2.2 mm 2.2 mm thin cord that has plenty of strength (90 kg) for a multitude of uses while trekking, at home or basically anywhere. Available in: 9 colors
0.60 €/m Strong Polyester Cord 2 mm Strong and multiusable cord from high quality polyester. Surface with good friction and easy tying. Available in: Black and Red
0.60 €/m Strong Polyester Cord 2.5 mm, Recycled Polyester Strong and multiusable cord from high quality resycled polyester. Surface with good friction and easy tying. Tent guylines etc. Available in: Black