costumes in O is their treatment to help withstand the water and chemicals in it. To achieve this feat, roughly 40% of the costumes have been applied with a specific type of silicon sizing. In addition, the materials chosen are more durable and had to be able to both mould to the performer's body and dry quickly. Over the years the best fabric found for the costumes has been nylon mesh, which performs well either wet or dry. Additional facts regarding the costumes: A separate room was built with timed heaters and fans to air-dry many of the costumes which cannot be tumble-dried. Sixty loads of laundry are done nightly to wash the costumes which can be machine washed. The swimmers' costumes are replaced every 3 months. The Comets' costumes last for a full year. All wigs and headpieces had to have chinstraps added. Music The music of O was composed by Benoit Jutras and features a mix of classical Western and world instrumentation, including Chinese violin (erhu), bagpipes, African guitar and harp (kora), Colombian guitar, cello, ancient woodwinds and a wide variety of percussion instruments. During the show, the score is performed by a live band situated behind glass walls above and to the side of the stage. The glass protects the musicians' equipment from moisture damage. Os music was recorded at the Bellagio and released on November 24, 1998. () The album was re-released on September 6, 2005. () The songs are listed below with their corresponding act in parentheses. Album track list (and acts in the show accompanied by each song): Jeux d'Eau (Solo and duo trapeze) Mer Noire (Barge) Tzelma (Interlude from bateau) Africa (Interlude from clown act 1) Remous (Bateau) Svecounia (Interlude from contortion, cerceaux) Nostalgie (Intro to russian swings) Simcha (Character parade, Russian swings) Gamelan (Contortion) Ephra (Flying man and cadre) Désert (Opening, nage, solo and duo trapeze) Terre Aride (Fire) O (Finale) Additional songs in the show not included on the album: Danse (Clown act 2) (2001-present) Debbie (Journey of Man) (Washington/solo trapeze) Festival (Interlude from Fire) Sur Terre (Clown act 2) (1998-2000) Plouf (High dive) La Glace (Clown act 1) (1998-2000) Reda Ver.1 (Opening) (1998-2000) Reda Ver.2 (Opening) (2001-present) Confluence (Interlude from Cerceaux) Merou (Washington trapeze) (1998 only) Nenuphar (Intro to contortion) Robinet (Clown act 1) (2001–present) Humoresque No. 7 Opus 101 (Opening Interlude) (1998-2000) Aurora (Opening Interlude) (2001–present)Filmography In 2007, Cirque