The Kewlioo Sauna Hoodie™ covers more of your upper body than a sauna tank, without the bulk of a traditional sauna suit. Its 3-layer KFIT® fabric is built to slow down how fast your body heat escapes, so more of that warmth stays against your upper body while you train. It looks like a clean black workout hoodie on the outside, with a smooth gray heat-retaining lining inside. The fabric feels light and flexible, so you can lift, run, stretch, and move without the stiff plastic feel of old-school sauna gear. Key Benefits More upper-body coverage: Long sleeves and a lined hood help keep warmth around your arms, chest, back, and head. Built to trap heat: The heat-retaining inner layer is designed to hold warmth in. Your body sweats to cool itself, so most people find they sweat more in it than in a regular training top. 3-layer KFIT® fabric: Made to hold in body heat while staying light, smooth, and comfortable to wear. Feels like real training gear: No bulky shape, loud material, or stiff plastic feel. Easy to move in: The flexible fabric and relaxed athletic fit give you room to train comfortably. Adjustable hood: Use the drawcords to set the coverage and fit you want.