The Rothco Two/Tone Street Caps are a very relaxed comfortable fitting design outdoorsy cap. The street caps are made of 55% cotton, 45% polyester blend in the olive/black color combo with wide side screen vents and has an adjustable leather strap back for a one size fit. These adventure military street caps are a perfect cap for travel, campers, fisherman, hiking and casual fashion. Size:One Size Fit Most