The Explore/Travel Crew sock is your most versatile sock for seeing the sites on your "Once in a Lifetime Vacation" or going to the office! This product leads our new ECO Collection engineered with Recycled Polyester. The perfect combination of eco-friendly sustainability while amazingly soft, breathable and durable -keeping you comfortable, and blister-free 3.5 plastic bottles used in each pair! Features Over 3.5 plastic bottles used in each pair of socks Recycled Polyester inner and outer layers Stabilizer Zone™ in arch locks sock in place High needle count for added durability Certified, Sustainable and Blister-Free socks - No Blisters, Guaranteed! Fiber ContentInner Layer: 70% Recycled Polyester, 26% Nylon, 4% SpandexOuter Layer: 68% Recycled Polyester, 24% Nylon, 8% Spandex Double Layer Seamless Toe Wrightsock's Double Layer styles offer a seamless toe like most performance socks do these days; however, as you can see on the below images, Wrightsock's seamless toe looks a bit different. This is due to the required attachments that connect the inner and outer layers together for our Double Layer system. Even though it looks a bit odd, our seamless toe acts and feels the same on your foot as any other seamless toe design.