best bets

Best Bet: Theory Adoncia Sweater

Open-weave sweaters graced the spring runways, seen at Derek Lam, rag & bone, and Rachel Comey. Warm without being suffocating, the lightweight knits are ideal layering pieces for the transitional weather. Pair with a tank now and throw over a bikini as a cover-up during the warmer months.

Theory Adoncia B Linen Sweater, $225 online.