During test of this product some athletes gave the following comments! The gym guys: Never ever did I feel and look this good in a tight long sleeve, it's really cool! The MMA guys: Finally a rash guard that does what it supposed to, loaded with attitude! The Colorado flex long sleeve is made of a high performance fabric, supported by Elastane to get the perfect tight fit. Large Better Bodies prints on sleeves! Quality: Composition 93% Polyamid, 7%