Hysenm Tour De France Polyester Breathable Sweat Absorbent Cycling Sports Sun Hat Helmet Liner Champion Cap Adopting 100% polyester mesh fabric, breathable, sweat absorbent and durable Relative flat brim, suitable to embed inside the helmet and prevent your sweat from coming into your eyes Environmentally thermal transfer print, lasting and cool Having perfect windproof, dustproof, perspiration absorbent, sun protective function; Ideal use in cycling, hiking, running, clibing,etc. One size, fits for head circumference from 56 to 61cm