A device for applying compression treatment to a part of a wearers body includes an S-shaped bladder (S1,S2,S3) with at least first (66) and second (68) spaced apart sections in fluid communication. At least one opening (72,74) is formed between the first and second sections. The at least one opening may a single opening extending along a majority of a length of the first and second sections. The at least one opening may be a plural of openings. At least one opening may be formed between the second section and a third (70) section of the bladder.
