| Feature | Joyous Collection | Ensi Collection | Tosi Collection |
|---|---|---|---|
| Infrared Type | Far Infrared | Far Infrared | Full Spectrum (Far, Mid, Near Infrared) |
| EMF Level | Low (<8mG) | Ultra-Low (<0.32mG) | Ultra-Low (<0.32mG) |
| Carbon Fiber Heaters | Yes | Yes | Yes |
| Full Spectrum Heaters | No | No | Yes |
| Bluetooth Speakers | Yes | Yes | Yes |
| Wood Type | Hemlock | Hemlock | Hemlock |
| Double Wall Construction | Yes | Yes | Yes |
| Warranty | 5-year | 5-year | 5-year |
| Increases blood circulation & oxygen flow | Yes | Yes | Yes |