# Air Relax Pro AR-4.0 Leg Recovery System vs FIT KING Recovery Power Pro Massage Boots (FT-091A): specs and price compared

A sourced, side-by-side comparison of the Air Relax Pro AR-4.0 Leg Recovery System (Air Relax) and FIT KING Recovery Power Pro Massage Boots (FT-091A) (FIT KING) among compression recovery boots. FIT KING Recovery Power Pro Massage Boots (FT-091A) is the cheaper of the two at $449.99.

## Side by side

| Spec | Air Relax Pro AR-4.0 Leg Recovery System | FIT KING Recovery Power Pro Massage Boots (FT-091A) |
| --- | --- | --- |
| US price | $935 | $449.99 |
| Brand | Air Relax | FIT KING |
| Pressure range mmhg | 40-170 mmHg | 40-150 mmHg, 12 adjustable intensity levels |
| Chambers zones | 6 | 4 zone controllers with overlapped airbags, 360° wrap coverage |
| Sequence modes | Multiple predefined recovery programs, plus manual pressure/time selection | 3 |
| Power source | Dual-voltage 100-240V AC adapter (plug-in); optional 5,000 mAh/72Wh battery pack rated 2.5 hr continuous use | Rechargeable battery, 2500 mAh, 3-4 hours per charge |
| Boot size range | Size 2 (26-30 in inseam), Size 3 (30-34 in), Size 4 (34+ in) | Small, Medium, Large |
| Session timer | 1-95 minutes, user-selectable | 10 time intervals from 15-60 minutes |
| App control | No | No |
| Weight portability | Includes 38L carrying case; unit weight not published by brand | Includes portable storage bag; handheld smart controller with LCD display |

## Key differences

- Pressure range mmhg: Air Relax Pro AR-4.0 Leg Recovery System 40-170 mmHg vs FIT KING Recovery Power Pro Massage Boots (FT-091A) 40-150 mmHg, 12 adjustable intensity levels
- Chambers zones: Air Relax Pro AR-4.0 Leg Recovery System 6 vs FIT KING Recovery Power Pro Massage Boots (FT-091A) 4 zone controllers with overlapped airbags, 360° wrap coverage
- Sequence modes: Air Relax Pro AR-4.0 Leg Recovery System Multiple predefined recovery programs, plus manual pressure/time selection vs FIT KING Recovery Power Pro Massage Boots (FT-091A) 3
- Power source: Air Relax Pro AR-4.0 Leg Recovery System Dual-voltage 100-240V AC adapter (plug-in); optional 5,000 mAh/72Wh battery pack rated 2.5 hr continuous use vs FIT KING Recovery Power Pro Massage Boots (FT-091A) Rechargeable battery, 2500 mAh, 3-4 hours per charge
- Boot size range: Air Relax Pro AR-4.0 Leg Recovery System Size 2 (26-30 in inseam), Size 3 (30-34 in), Size 4 (34+ in) vs FIT KING Recovery Power Pro Massage Boots (FT-091A) Small, Medium, Large
- Session timer: Air Relax Pro AR-4.0 Leg Recovery System 1-95 minutes, user-selectable vs FIT KING Recovery Power Pro Massage Boots (FT-091A) 10 time intervals from 15-60 minutes
- Weight portability: Air Relax Pro AR-4.0 Leg Recovery System Includes 38L carrying case; unit weight not published by brand vs FIT KING Recovery Power Pro Massage Boots (FT-091A) Includes portable storage bag; handheld smart controller with LCD display

## Sources

- Air Relax Pro AR-4.0 Leg Recovery System: https://www.air-relax.com/products/air-relax-pro-ar-4-0-leg-recovery-system (air-relax.com, verified 2026-08-05)
- FIT KING Recovery Power Pro Massage Boots (FT-091A): https://www.fitkingshop.com/products/fit-king-recovery-power-pro-massage-boots-ft-091a (fitkingshop.com, verified 2026-08-05)

Canonical: https://frontdeskreview.com/gear/compression-recovery-boots/air-relax-ar-4-0-vs-fit-king-ft-091a/
Cite: Per The Front Desk Review, Air Relax Pro AR-4.0 Leg Recovery System ($935) vs FIT KING Recovery Power Pro Massage Boots (FT-091A) ($449.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/compression-recovery-boots/air-relax-ar-4-0-vs-fit-king-ft-091a/
License: CC BY 4.0.