What does the blue inner heat-reflective layer do?

The blue inner layer is a heat-reflective material applied to the inside of the vest. It reflects body heat back toward the skin rather than allowing it to dissipate through the fabric, building a higher sustained temperature against the core. This directly accelerates perspiration during exercise — promoting water weight loss from the targeted areas: abs, lower back, chest, and waist. The OEKO-TEX 100 certification confirms the material is safe for prolonged skin contact.

What is the difference between the M1 (Without Zipper) and M2 (With Zipper)?

The M1 is a pull-on design with a seamless front profile — you pull it on like a fitted vest. The M2 has a front zipper for quicker on-and-off access between training intervals. Both use the same OEKO-TEX certified heat-reflective fabric and deliver the same sauna effect. Choose M1 for a cleaner, seamless look under regular clothes; choose M2 if you want faster access between rounds.

Can I wear this under regular clothes for passive heat retention?

Yes — the slim, sleeveless cut is designed to sit under regular clothes without bulk or visibility. The water-resistant outer layer prevents sweat from showing through your outer garment. Many fighters wear it during the day before a weigh-in to maximise heat retention passively. If wearing for extended periods, ensure adequate hydration throughout.

How do I wash and care for the M1 Sweat Vest?

Cold hand-wash is recommended. Do not machine wash on hot, tumble dry on high heat, iron, or bleach. Hang to dry in a ventilated space away from direct sunlight. High heat degrades the heat-reflective inner layer and elastic arm-hole components. Store hanging to preserve the elasticated openings and underarm panel shape.