KFMK originally signed on in 1958 with a popular music format, but later migrated to a classical music format. By 1967, KFMK moved to a Top 40 format, competing against KRBE and had a slight advantage over KRBE because it was in stereo, although the latter had a stronger signal at the time.By May 1968, KFMK transitioned to become Houston's first progressive rock station, known as "Mother Radio". In early 1969, KFMK abruptly changed to a Christian format. The station reverted to Top 40 in the late 1970s, which would then transition to an Oldies-oriented AC format in the 1980s. This hybrid format lasted until the station changed its call letters to KBXX in 1991. This Gildan t-shirt has a classic fit with thick cotton fabric.• 100% cotton• Sport Grey is 90% cotton, 10% polyester• Ash Grey is 99% cotton, 1% polyester• Fabric weight: 5.0–5.3 oz/yd² (170-180 g/m²) • Open-end yarn• Tubular fabric• Taped neck and shoulders• Double seam at sleeves and bottom hem Size guide LENGTH (inches) WIDTH (inches) SLEEVE LENGTH (inches) S 28 18 15 ⅝ M 29 20 17 L 30 22 18 ½ XL 31 24 20 2XL 32 26 21 ½ 3XL 33 28 22 ¾ 4XL 34 30 24 ¼ 5XL 35 32 25 ¼