5.4 oz, 32 singles52% airlume combed and ringspun cotton, 48% polyester Athletic Heather: 90% airlume combed and ringspun cotton 10% polyester 1×1 rib High neckFittedSustainably producedWrap certified and FLA participating companyTear away labelBella+Canvas uses sustainable manufacturing processes with Blue Sign certified dyes, efficient dye houses that adhere to the state of Californias EPA regulations around waste water treatment and usage, and cutting facilities in Los Angeles that run on partial solar power with comprehensive recycling programs for paper waste and fabric scraps.