changes to the model lineup, including launching several new series of instruments and discontinuing the Revival series of traditional body shapes. In 2015, Breedlove produced a limited run of 25th Anniversary guitars, including a Kim Breedlove Signature, a Brazilian Concert, an Oregon Concert, and a Pursuit Koa. In 2017, Breedlove made significant strategic changes, including the announcement of the new Concerto and Concertina body shapes, the simplification of the company's model lines and body shapes, the introduction of a Sound Optimization process (replacing the long-standing bridge truss and graduated top design used on its premium models), and the introduction of the Tonewood Certification Program for sustainable forest practices. In 2020, Breedlove announced a partnership with actor Jeff Bridges to produce a signature model guitar that was sustainably sourced. Later that year, two additional Jeff Bridges models were announced. In 2021, Breedlove announced a limited run of four 30th Anniversary guitars, including a Northwest Classic, King Koa, Focus, and Phoenix, each based on a different model from Breedlove's past. Current guitar models Guitar body shapes As of 2021, Breedlove offers four guitar body shapes in ascending order of size: Companion: A travel/parlor guitar with a 13.5 inch lower bout, 14 frets to the body, a 23.5 inch scale length, and a body depth of 3.25–4.00 inches. Introduced in 2020. Concertina: A small-bodied guitar with a 14.75 inch lower bout, 12 frets to the body, a 25 inch scale length, and a body depth of 3.25–4.00 inches. Introduced in 2018, replacing Parlor shape. Concert: A medium-bodied guitar with a 15 inch lower bout, 14 frets to the body, a 25.5 inch scale length, and a body depth of 3.75–4.50 inches. The Concert is Breedlove's most popular body shape, dating back to 1991. Concerto: A large-bodied guitar with a 16 inch lower bout, 14 frets to the body, and a 25.5 inch scale length, and a body depth of 4.00–5.00 inches. Introduced in 2017, replacing Dreadnought, Jumbo, and Auditorium shapes. A Concerto cutaway model was introduced in 2018. Oregon-built guitar series Breedlove's Masterclass, Legacy, Premier, and Oregon models, as well as some premium Signature models, are made in Bend, Oregon and are hand-voiced using the Sound Optimization System. Masterclass: Formerly a high-end production line dating back to the founding of the company, now a reserved name for Breedlove Custom Shop models and limited editions. Signature: Launched 2020 as a partnership with actor Jeff