Shop Pistil Hats Marvin. The Marvin combines the confident look of an Aussie outback hat with plenty of practical perks. It can be compressed for easy stashing in your pack, the chin strap is adjustable, and the wide brim deflects the sun (hat gets a UPF 50+ rating). The crown is a lightweight cotton/nylon ripstop and the brim and hatband have a contrasting mesh/grid texture. It’s unlined to help you keep a cool head, and interior seams are reinforced with seam tape. A soft interior band absorbs brow sweat and snugs the fit.