Why is that man wearing dotted suspenders? To add an old-fashioned dressiness to his clothes--and to hold up his pants. It is only in small ways that menswear moves these days: the patterning of socks, the recoloring of jackets, the pattern change in knits, and the revival of old favorites--even suspenders.

The new crop of suspenders doesn't look very different from the old. We've ignored the silly stuff with hearts and flowers in favor of dots with dash and new colors.

For those who have not tried them before, suspender aficionados tell us that the most comfortable versions are rigid with a length of stretch at the back, and they actually fit better than the all-stretch variety. (If your pants don't have buttons for suspenders, many of the suspenders come with their own.) CAPTION: Picture 1, Classic gray elastic suspenders ($7.50) by Swank, pink oxford cloth shirt, silk bow tie with tiny print from Chaps by Ralph Lauren, gray flannel trousers; all at Hecht's.; Picture 2, Red suspenders with leather ends ($22.50), Polo by Ralph Lauren brown herringbone suit, blue and white striped cotton shirt, red silk tie, all at Garfinckel's.; Picture 3, Brown leather suspenders with brass clips ($25) at Akin Leather Boutique; brown and blue check cotton flannel shirt and gray cotton/polyester corduroy pants, both at Eddie Bauer.; Picture 4, Navy and whitee Swiss dot suspenders ($45), gray cotton shirt with white collar, wine silk hand-finished tie, all by Alan Flusser at Britches of Georgetowne.; Picture 5, Polo by Ralph Lauren navy blue and yellow stripe suspenders ($28.50) with leather button ends, Allen Solly navy and white stripe cotton shirt, cotton khaki pants, all at Bloomingdale's. PHOTOGRAPHS BY JOHN BOWDEN. MODEL: CLAY DAUGHTRIDGE