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Women's racerback tank is printed on American Apparel TR308 Tri-Blend
Women's tee is printed on American Apparel TR301 Tri-Blend
Both are made with 50% Polyester / 25% Cotton / 25% Rayon construction.
"...Polyester retains shape and elasticity; Cotton lends both comfort and durability; addition of Rayon makes for a unique texture and drapes against the body for a slimming look..."