Compression device having weld seam moisture transfer

A device for applying compression treatment to a part of a wearer's body, the device comprising:

• a wicking layer having a first face facing skin on the wearer's body part when the device is mounted on the body part for wicking moisture from the skin and a second face facing away from the skin of the wearer's body part, the wicking layer including polymeric wicking fibers;
• a bladder for selectively applying compression to the body part, the bladder comprising two sheets of air impermeable thermoplastic bladder material sealed together, the sheets of bladder material having a thickness, the sheets of bladder material being bonded to the second face of the wicking layer along a seamline formed by an RF weld that extends from the wicking layer through the thickness of the sheets of bladder material and runs along a periphery of the sheets of bladder material, wherein the polymeric wicking fibers of the wicking layer extend through the seamline from one side of the seamline to an opposite side of the seamline to allow fluid wicked by the wicking layer from the wearer's skin to evaporate to the atmosphere, the wicking layer and sheets of bladder material being free of needle punched fibers at the seamline that extend through the thicknesses of the sheets of bladder material.