From casual-looking suits and separates to other garments made from polished yet sturdy fabrics, this fall’s menswear exudes a decidedly laid-back style. The accessories shown here fit with that refined but relaxed sensibility. The Fratelli Rossetti shoe boot (www.fratellirossetti.com, $820 per pair) is an all-purpose suede-and-leather boot that is as comfortable as it is stylish. The Parabellum textured leather briefcase (www.parabellumcollection.com, $2,450) exemplifies the season’s sporty mood with its distressed-looking case made of American bison skin and trimmed with sturdy ceramic hardware. The finishing touch is a Kiton cashmere scarf (www.kitonus.com, $874).