Our Uunderworks Invisible Stay On Footlets are made for all day wear. They combine comfort and reliability with a super heel grip feature that is designed to stay on and still not show above your shoes. They are a combination of seamless comfort, stay-on-ability, and a great Invisible fit. 33, 34, By choosing our cotton products, youre supporting our investment in Better Cottons mission. Better Cotton is sourced via a system of mass balance and is not physically traceable to end products. No seams Odour control technology Materials Cotton/Nylon/Elastane Care Instructions Gentle machine wash in laundry bag. Extra Info UNDERWORKS 1481,Family owned since our inception in 1999, Underworks has been designing, developing and innovating in the sock space since day one. Right by you and right by the planet! For generations to come.