Manufactured using recycled plastic bottle polyester. Lab tested knot slippage tests which how much force is required to loosen the knot. Non-wicking means water beads off instead of soaking in. Packed with features they are manufactured using recycled plastic bottle polyester that has wear resistance higher than normal industry standards. The packaging has been selected with careful consideration, featuring recycled and recyclable kraft card and soya inks which make it far easier for our recycling centres to process. Packed with zero single use plastic, in a trade box which contains 50 units.