They come in three weights- light, medium, heavy- and provide just the right amount of resistance to lightly work my shoulders and reduce pain. One month in and I feel so much better.Allahummanfa'ni bima 'allamtani wa 'allimni ma yanfa'uni wa zidni 'ilman walhamdulillahi 'ala kulli halin Allaahumma innii istaudi’uka maa ‘allamtaniihi fardud-hu