Spigen Athlex Air is a sporty, ultra‑light nylon strap for Apple Watch Ultra (49 mm), Series 10 (46 mm), Series 9/8/7 (45 mm), SE2/SE/6/5/4 (44 mm). Crafted from breathable, premium fabric, it offers all-day comfort and built-in stretch to prevent irritation during activity. Its hook-and-loop fastener provides slip-proof adjustment and quick secure fitting. Available in Active Black, Gray, Navy, and Green with sporty yellow stitching accents.