"The Summersalt Midi Sports Bra Tank Top ($65) is made from recycled fabric and it hits at the perfect spot. It also has a built-in bra for support with adjustable straps that tighten the fit. I'm wearing mine with the matching Summersalt Do-It-All High-Rise Leggings ($95). Each pair is developed using recycled plastic bottles and features moisture-wicking fibres that keep you cool while working out. Bye, butt sweat!" — Claire Stern, contributing editor, Fashion