The Ursa Back Strap allows you to securely rig Lav Microphone or IEM packs to the centre of the Talent's back, between the shoulder blades. Ursa Back Straps are available in Colors Black & Beige as well as in sizes Medium and Large Ursa Back Strap features Medium size fits a 36-40 inch chest and Large fits a 41-45 inch chest. The gripper straps are adjustable A Wireless Transmitter can be rigged with the aerial facing down or up. The Ursa Back Strap Pouch fits all transmitter/receiver sizes Rigs pack between the shoulder blades Machine Washable with detergent at 40 Degrees. Hang dry or Tumble Dry. Ursa Back Straps Compatibility list Audio Ltd 2040, Mini TX, A10, EN2 Shure PSM 1000, 900, 300, QLX, ULX, AD1, AXT, UR1M, ADX 1M 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, Q5X PlayerMic S