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Mississippi River Festival, or MRF, was an outdoor concert series held from 1969 to 1980 on the campus of Southern Illinois University in Edwardsville, Illinois. Many top performers of the day appeared. The run ended when the university asked the new promoter to bring in classical music artists in addition to the pop rock acts. The promoters refused, and the festival died.
Needing to know what size to order? Have no fear! This page has all of the answers to your sizing and garment questions.
Unisex T-Shirt - 52% Airlume combed and ring-spun cotton, 48% poly

Women's Scoop Neck T-Shirt -Â 52% Airlume combed and ring-spun cotton, 48% poly

Women's V-Neck T-Shirt - 50% polyester, 25% Airlume combed and ring-spun cotton, 25% rayon

Women's Racerback Tank - 50% poly 25% Airlume combed and ring-spun cotton 25% rayon

Women's Muscle Tank - 65% poly, 35% viscose
 
Unisex Long Sleeve T-Shirt - 52% Airlume combed and ring-spun cotton, 48% poly

Unisex Hooded Sweatshirt - 55% cotton, 39% polyester, 6% rayon

 Unisex Crewneck Sweatshirt - 80% ring-spun cotton/20% polyester

Unisex 3/4 Sleeve Raglan - 50% poly, 25% Airlume combed and ring-spun cotton, 25% rayon

Youth T-Shirt - 93% combed ringspun cotton, 7% polyester
 
Toddler T-Shirt - 93% combed ringspun cotton, 7% polyester

Onesie - 100% combed ringspun cotton

 Still don't know. Just contact info@oldschoolshirts.com, and we can give you more details!