Unless your summer home is in Verkhoyansk, it’s probably time to lighten up your bed sheets. Skip the sateens, though. You're looking for linen and breezy, organic cotton. Linen has an open weave, so it’s extremely breathable. Organic cotton feels crisp and cool even when it's hot out. Plus, the more you wash either one, the softer they get. Here are the ones we like.