Back in Stock! Tired of your trainer yelling at you to get your shoulders back? Our newest product is an adjustable and elastic reminder that takes the place of that old trainer trick of the whip behind your back that is an uncomfortable over-correction. Put it higher on the arms to work on your shoulders and lower on the arms to work on your elbows. Comfortable without be too restrictive or compressive. Regular size fits most women under dress size 16 ((US) 20 (UK) or 48 (EU) with biceps less than 12" (30cm) in diameter. Our Large size fits great for women who wear over a dress size 16 (US) 20 (UK) 48 (EU) and men who wear shirt size L or larger.