Elastic rubber strap provides micro adjustment & prevents scratches. One piece design is light & simple. Constructed of engineering grade polymer for extra durability. Features an insert for secure bottle retention Elastic rubber strap provides micro adjustment & prevents scratches MATERIAL Engineering grade polymer OUTER DIAMETER Fits standard water bottle SIZE 14.7 x 8.4 x 7.9 cm / 5.8” x 3.3” x 3.1” WEIGHT 45 g / 1.58 oz