1. Product Overview
The Nike Air Vapormax 2021 FK Unisex Shoes are designed for comfort and performance, featuring a flexible synthetic and rubber construction. This manual provides essential information for the proper use and care of your footwear.

Image 1: Front-side view of the Nike Air Vapormax 2021 FK Unisex Shoes. The shoe features a black and bright crimson knit upper with a prominent orange Nike swoosh on the side. The translucent Vapormax sole is visible.
2. Setup and First Use
Your Nike Air Vapormax 2021 FK shoes are ready for use right out of the box. Follow these steps for optimal comfort:
- Unpack: Remove the shoes from their packaging and any internal paper stuffing.
- Lacing: Adjust the laces to achieve a secure yet comfortable fit. Ensure the laces are evenly tightened across the foot.
- Initial Wear: Wear the shoes for short periods initially to allow them to conform to your foot shape.

Image 2: Side profile of the Nike Air Vapormax 2021 FK Unisex Shoe. This view highlights the intricate knit pattern of the upper and the full-length translucent Vapormax air unit sole, designed for cushioning.
3. Operating Instructions
These shoes are designed for general athletic and casual wear. To ensure longevity and performance:
- Intended Use: Suitable for road running, light training, and everyday casual activities.
- Fit: Ensure a snug fit without excessive pressure points. The flexible upper material adapts to your foot.
- Terrain: While durable, avoid excessively rough or sharp terrain to prevent damage to the Vapormax sole.

Image 3: Rear view of the Nike Air Vapormax 2021 FK Unisex Shoe. The heel features a sturdy black heel counter with "VAPORMAX" branding embossed. A pull tab is present for easy donning, and the translucent sole extends to the back.
4. Maintenance and Care
Proper care will extend the life and appearance of your Nike Air Vapormax 2021 FK shoes:
- Cleaning the Upper:
- For light dirt, wipe with a soft, damp cloth.
- For tougher stains on the synthetic knit, use a mild soap solution and a soft brush. Gently scrub and wipe clean.
- Cleaning the Sole:
- Use a soft brush or old toothbrush with mild soap and water to clean the synthetic rubber sole.
- Rinse thoroughly with water, avoiding soaking the entire shoe.
- Drying:
- Air dry at room temperature. Do not use direct heat sources like radiators or hair dryers, as this can damage materials.
- Stuff with paper towels to absorb moisture and help maintain shape during drying.
- Storage: Store in a cool, dry place away from direct sunlight.
5. Troubleshooting
If you encounter any issues with your shoes, consider the following:
- Discomfort/Poor Fit:
- Ensure laces are properly adjusted.
- Verify correct size. Refer to the Nike size guide if unsure.
- Allow for a break-in period, as the knit upper may adapt over time.
- Squeaking Noise:
- Sometimes caused by moisture between the insole and the shoe bed. Remove insoles, clean, dry thoroughly, and reinsert.
- Can also be due to the sole material on certain surfaces.
- Sole Wear: The Vapormax sole is designed for durability, but excessive wear on specific areas may indicate gait issues or heavy use on abrasive surfaces.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Nike |
| Model Number | DQ3974002 |
| Product Dimensions | 14 x 9 x 5 inches; 3 Pounds |
| Department | Unisex (listed as mens) |
| Date First Available | January 29, 2025 |
| Manufacturer | Nike |
| Fabric Type | Synthetic-and-rubber |
| Origin | Made in the USA or Imported |
| Sole Material | Synthetic Rubber |
| Outer Material | Synthetic Resin |
7. Product Video
Watch this video for a closer look at the Nike Air Vapormax 2021 FK shoes, highlighting key features and design elements.
Video: A detailed review showcasing the Nike Air Vapormax 2021 FK shoes, including views of the upper knit, the Vapormax sole, and internal features. The video provides a comprehensive visual overview of the product.
8. Warranty and Support
Information regarding product warranty and customer support for the Nike Air Vapormax 2021 FK Unisex Shoes was not available in the provided product data. Please refer to the official Nike website or contact Nike customer service for detailed warranty terms and support options.