Introducing the new URSA Back Strap. This strap allows you to securely rig microphone or IEM packs to the centre of back, between the shoulder blades. Medium size fits a 36-40 inch chest and Large fits a 41-45 inch chest. Adjustable gripper straps Available now in Black & Beige and Medium and Large Transmitter can be rigged with the aerial facing down or up. Fits all transmitter/receiver sizes Rigs pack between the shoulder blades Machine Washable with detergent at 40 Degrees. Hang dry or Tumble Dry. https://www.youtube.com/watch?v=J1D2lDilgBo Strap Type Leg Strap Size Comparison Medium Size 36-40 inch Chest Large Size 41-45 inch Chest Pouch Size Transmitter Compatibility Universal Pouch Audio Ltd 2040, Mini TX, A10, EN2 Shure PSM 1000, 900, 300, QLX, ULX, AD1, AXT Tascam DR-10L Sony UWP-D11 Saramonic UWMIC9 TX9 Lectrosonics LMb, WM, UM400a, DCHT, SMDB, SMB, LT & SSM Wisycom MPT40 / 41 Zaxcom TRX & ZFR, TRX LA2 & LT2, ZFR 200 & 300 Sennheiser G2, G3, G4, AVX, SK2000, SK5212, SK9000, SK 5212, SK 9000 Micron TX700B, Shure UR1M, ADX 1M, Q5X PlayerMic S