The Friendly Swede Sports Sunglass Holder Strap (4 Pack) LIGHTWEIGHT WITH RUBBER GRIPS: 4 lightweight polyester thin-frame sunglass retainers with rubber grips for sports, outdoor activities and everyday use EXTRA LONG: Straps are approximately 27" (70cm) long, allowing sunglasses to be comfortably hung on your chest, or rest on top of your head COMFORTABLE: Adjustable toggle on cords ensures that straps will not easily fall off and are comfortable for all head sizes and shapes SECURE: 2.3" (6 cm) rubber grips are extra secure, suitable for thin-frames up to 0.4 (1 cm) thick and can be easily trimmed according to preference. Straps may not fit thicker frames such as Wayfarers LIFETIME WARRANTY: This product is covered by The Friendly Swede's Lifetime Warranty