Fit & Design One size fits most 4-way ultra-stretch material 100% seamless design for comfort Can be worn 12 different ways Lightweight Technology HeiQ cooling technology Polygiene(R) odor control UPF 50+ protection against harmful UV rays Additional Details Buff(R) CoolNet UV+(R) multifunctional headwear is approved and recommended by The Skin Cancer Foundation Dimensions: 20 1/2" (L) x 9" (W)