By Paolo Sandoval Sweating through all your shirts? Realizing that those lightweight pants aren’t actually that lightweight? Sounds like you could use a little do-over on your warm-weather wardrobe. After all, we’ve still got 65 days of summer left — and that’s not counting the predictably unpredictable sweltering fall days. That’s where Everlane comes in. Right now, the San Francisco-based retailer and best basics-maker around is throwing its annual Summer Sale, with 50% off in-season styles. We’re talking stellar swim trunks, cotton tees and breezy button-ups, all at huge discounts. The Ever…