100% waterproof, UtiliSleeves are made of durable water-repellent nylon and feature a secure Seamtite wrist cuff. Seamtit is the same technology used in diving gear, helping to ensure your wrists stay dry. To achieve a custom Seamtite cuff fit, cut cuff to the desired width using the 1/8” guides. UtiliSleeve’s arm band stays put using silicone gel backed elastic. One-size-fits-most, sleeves are sold by the pair. Black in color.