By Paolo Sandoval Summer is almost here (or in full swing, depending on who you ask), which means sweltering heat, unsanctioned half-day Fridays, the blessed return of short shorts — and of course the one phenomenon that really matters: the variety of banging seasonal sales that crop up in between June and July. Chief among these excellent events is the Adidas End of Season Sale, which ushers in jaw-dropping savings of up to 50% on new and old styles alike, making it not only a great time to pick up workout staples and sleek athleisure, but the summer’s hottest styles (we’re looking at you, Fo…