60% Polyester, 30% Rayon, 10% Spandex Made in the USA or Imported MIDWEIGHT PERFORMANCE BASELAYER - Made from a soft, stretch poly-blend fabric (60% Polyester, 30% Rayon, 10% Spandex), the Proton Heated Baselayer Pant is ideal for cold mornings and extended outdoor activity. Designed in the USA for comfort, mobility, and performance. MULTI-ZONE HEATING TECHNOLOGY - Features three integrated heating elements: 2x inner thighs and 1x back. Strategically placed panels deliver balanced warmth to key muscle groups without restricting movement. LONG-LASTING WARMTH WITH DUAL CONTROL OPTIONS - Provides up to 10 hours of heat depending on setting. Adjust temperature using the built-in touch control button with LED indicator or through the Bluetooth-enabled MW Connect app (iOS and Android compatible). Choose from four selectable heat levels. RECHARGEABLE BATTERY POWERED - Includes a 7.4V 2200mAh lithium-ion rechargeable battery engineered exclusively to power compatible Fieldsheer heated garments. The battery powers the heating elements within the garment only. EASY CARE DESIGN - Machine washable (remove battery before washing). Heating elements are safely integrated and designed to withstand standard wash cycles.