Inspired by the life and values of Ida Siu, every piece in the IDA+S outerwear collection is grounded in purpose. Raised with little and driven to build something lasting, Ida Siu believed that clothing should stand up to the demands of real life, while still feeling refined. That belief lives on in every stitch: timeless cuts, luxurious materials, and a commitment to sustainability.
Our Coats & Outerwear collection includes refined trench coats, longline silhouettes, belted variations, and double-breasted wool styles with a nod to classic tailoring. Oversized coats offer an effortless layer that slips easily over knits or suits without compromising shape. Each coat is designed to transition across seasons and settings: from your morning commute to a last-minute dinner, from long walks with a friend to quiet weekend errands.
Crafted for practicality but elevated in design, IDA+S outerwear offers thoughtful construction, a considered fit, and lasting quality. Because what you wear most should live up to the life you lead.
Deep navy, rich charcoal, soft taupe, classic black: every shade in the IDA+S coat collection is designed to earn its place in your wardrobe. Our palette is built with longevity in mind, versatile shades designed to work across seasons and evolve with your wardrobe.
A coat should feel like it was made for you. With our detailed sizing guides, finding your ideal fit has never been simpler. Each product page includes exact measurements for bust, waist, hips, and garment length, helping you make an informed decision without second guessing.
At IDA+S, we believe longevity is one of the most sustainable choices you can make. That’s why every coat comes with clear, practical care instructions tailored to its fabric. Wool and cashmere styles benefit from professional dry cleaning to preserve structure and softness. Silk and silk-wool blends are best hand-washed gently in cold water or dry-cleaned for longevity. Caring for your coat means protecting not just the garment, but the values behind it, and respect for quality, craftsmanship, and conscious living. Always check the care label for garment-specific instructions.
A well-loved coat deserves thoughtful storage. When the seasons shift, keep your outerwear in a cool, dry wardrobe or closet, protected by a breathable garment bag to prevent dust and moth damage. Avoid wire or thin hangers that can distort the shoulders. Instead, use sturdy wooden or padded hangers to help maintain shape. These small, intentional steps ensure your IDA+S coat remains in excellent condition.
Choosing IDA+S means investing in outerwear that goes beyond the moment. Each coat is built to last, designed with care, and created to align with the values you live by: quality, intention, and a more sustainable future.
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