After spending the last year testing various yarns and perfecting the coziest textures and weaves, designers Gillian Mahin and Laura Hall have launched their debut collection of knitwear for fall. And leave it to the purveyors of the daintiest and sexiest lingerie to design knit jumpsuits, dresses, tank tops, oversized beanies and sweaters that manage to be . . . well, sexy and wearable. Having to say goodbye to summer doesn’t seem so bad after all, no?