Casso Silicone Magnetic Band

Absolutely! Whether you’re rocking the original Series 1 or the latest model, we’ve got you covered. Just check the size on the back of your watch (if you're not sure), and we'll handle the rest. It’s that easy.

Yes. All Astra Straps bands use use precision-machined stainless steel connectors that lock securely into your Apple Watch — the same mechanism Apple uses. They won't scratch your watch or interfere with sensors like heart rate or blood oxygen. All our materials are skin-safe and nickel-free, and using a third-party band does not void your Apple Watch warranty.

We get it – sometimes things just don’t work out. If you’re not in love within 100 days, send it back, no questions asked. We’ll refund you, no drama. We want you to have a band you absolutely love.

We’re all about speed. Most orders ship within 1-2 days, and you can expect it to arrive shortly after.

Plus, if you spend over $50, shipping is on us. Because let’s be real, no one wants to pay extra for shipping.

Great question! At Astra Straps, we don’t just make bands – we craft them.

Every single band is hand-finished to ensure the highest quality and attention to detail. We’re all about combining top-notch materials with unique designs that reflect your personal style.

Plus, we test every band for comfort and durability, so you can count on a strap that’s as strong as it is stylish. When you choose Astra Straps, you’re not just getting a band – you’re getting a piece of wearable art.

The Casso uses two magnetic contact points instead of one, which means the band locks into place at two spots along the closure. This gives you a stronger, more reliable hold than single-magnet designs — it won't slide or shift during movement. You still get the convenience of a magnetic band that's easy to put on and adjust, but with noticeably more security.

The Casso delivers a similar bold, segmented aesthetic with its grooved silicone construction and two-tone color design — especially in colorways like the starlight/orange shown here. It gives your Apple Watch that rugged, Ultra-inspired look at a fraction of the price, while the magnetic closure makes it easier to put on and take off than either of those bands.

The opposite, actually. The grooved design is intentional — those channels create space between the band and your skin, which promotes airflow and lets moisture escape instead of pooling underneath. The silicone itself is sweatproof and waterproof, so you can rinse the whole band under water after a workout and it dries in minutes.

The two-tone pairing is consistent across all 18 options — each one features a neutral or bold outer color with a contrasting inner layer that flashes when the band naturally moves on your wrist. Some combinations are subtle (like starlight on starlight), while others are high-contrast (like the gray/orange). It's a design detail that makes even simple colors feel more premium and intentional