Guru tip: Feels like wearing air. Only sweatier.

Tech tip: When the heat turns up, the Craft Men’s Pro Hypervent Singlet 2 shows up. This ultra-lightweight, hyper-breathable singlet is built for serious runners who treat summer miles like a badge of honor. With mesh that feels like it’s got AC built in and a barely-there fit, this singlet keeps airflow maxed and chafing to a minimum. Engineered with quick-dry fabric and laser-cut ventilation, it’s basically a personal cooling system—minus the batteries.

Buy this singlet if… you train like it’s race day, even when it’s 90° out.

Don’t buy this singlet if… you prefer to suffer in cotton.