Our Companion Trek Trucker Hat offers features both cool and comfy: mesh backing for breathability, Merino and polyester mesh fabric liner for moisture management and temperature regulation, and an adjustable snap back closure for the perfect fit. Plus the brim is made with Bureo NetPlus material, which is made entirely of recycled fishing nets, to help keep our oceans free of wildlife-snagging debris. From feel-good fashion and functionality to do-good steps toward ocean preservation, this trucker hat has it all.