RailRiders Regulator Shirt is a bad-ass wind regulator that is also great for the warmer- weather months. Featuring a 2-ply, 3 oz super, soft Nylon and Polyester blend that is made to block the wind. Plus, the shirt offers UPF 40+ dun protection and material that dries in seconds.Features also include: stand-up sun collar, underarm and side torso zippers for cooling ventilation when the sun reaches its mid-day apex, and cleverly placed adjustable cuffs for rolling or pushing up the forearm.Not only that, but the shirt is great for travel and packs up to the size of your fist!.Features:Weight: 8.0 ozFeatherweight 2oz super soft nylon/polyesterFlip up sun collar to protect your neckUnderarm and torso zippers for complete regulation of temperature and air FlowDeep front zipper for easy on and offSecure zippered chest pocketdrawstring for cinching at waist