10450 Simms Men's Guide Long Sleeve Shirt Spring in the Rockies means baetis littered back eddies, the off key chorus of awakening cicadas, and overtime for guides chasing hatches of playoff proportions. For fishing seasons without sleep, Simms' Guide LS shirt is a feature rich river ally always at the ready. Pro inspired architecture stems from easy wearing, quick drying nylon fabric kitted with UPF50 sun protection. When the heat flares, stay fresh thanks to a vented mesh lined back panel that amplifies airflow. Roll up sleeves, lock them in place with button retainers, and cast all day in comfort. And keep it simple, smart, and in focus with fly box compatible chest pockets and a sunglasses cleaning chamois at the shirt's hem.