Okay, if you wear glasses or sunglasses and hate when they fall off or get lost, these straps are about to become your new best friend. You get six in a pack with black and red colors that work for everyone. They're made from spandex and nylon that have amazing stretch - we're talking 200% elastic recovery - but they're also quick-drying and lightweight. Each strap is about 30cm long and 1cm wide with an adjustable slider so you can get the perfect fit for your head. They work with pretty much any glasses - myopia, reading glasses, sunglasses, goggles - as long as the frame width is between 0.33 and 0.52 inches. Perfect for sports like basketball, cycling, fishing, hiking, or even just working where you're moving around a lot. The design keeps your glasses secure without feeling tight or uncomfortable. They're so easy to use - just clip them on your temples and adjust the length. The company stands behind them with a lifetime guarantee too, which is pretty awesome for such an affordable product. Seriously, if you're tired of constantly pushing up your glasses or worrying about them falling in the water or off a trail, these straps are a simple solution that actually works. Great for kids, adults, seniors - basically anyone who wears glasses and wants some extra security.