MATERIALS Transparent adjustable bra straps made of eco-friendly, highly elastic TPU material; with plastic hooks for a better fit; bra clips made of plastic. Quantity: 3 bra strap holders (1 of each colour) and 9 bra clips (3 of each colour), enough for you to use and replace. Cotton Bra straps and clips: non-slip bra strap clips are about 21cm/8.27" long and 1cm/0.4" wide, adjustable length as needed, bra clips are 3.5 x 4.3 cm/1.4"*1.69". MAKE YOU MORE BEAUTIFUL: Provide extra lift and support, can increase the cup size, enhance your silhouette, make your bust line look fuller, make you more beautiful, create a sexy and voluptuous look. USES: The bra strap retainer is suitable for sports, running, hiking, exercising and other strenuous activities, works perfectly with most bras.