Attention: Please CONTACT US at the first time if got defective items; For 30 day after the date of purchase, we take care of all quality-related issues with a REPLACEMENT or REFUND. SINGLE-LAYER PATTERN: Lamshaw Scrunchie elastic replacement strap is USES the ultra supple Nylon material and the first-level cotton manufacture becomes. Above all, we only use Single-Layer Pattern. Because the Double-Layer Pattern Stretch Bands will cracks more easily. SKIN-FRIENDLY MATERIAL: Single-layer elastic band material which is skin-friendly, durable breathable and lightweight design. It's a stretch bracelet wrist bands and fits snugly without constriction. Durable elastic band makes you feel comfortable to wear. Multi-COLOURED BANDS: Multiple patterns for choice. The colorful band is usually perfect choice for any occasion. EASY CHANGE STRAPS: The sport band comes with watch lugs on both ends, which locks onto your Smartwatch precisely and securely. Easy for installing directly and removing with one button.