Made with care and unconditionally loved by our customers, this signature bestseller exceeds all expectations.

Cassian Aio Peson Half-Zip Sweater
Product Details
Minimal in detail yet enduring in comfort. The Cassian Aio Peson Half-Zip Sweater is built for quiet strength — crafted in thickened cotton knit for warmth and structure through fall and winter. Defined by its stand collar and clean half-zip front, it offers versatile layering while maintaining a refined silhouette. Cassian reflects Ompious’ philosophy: essentials that combine function and clarity, designed to move with you and stand the test of time.
Size (US) | Bust | Shoulder Width | Sleeve | Length |
XS (34) | 40.16" | 17.32" | 24.80" | 26.38" |
S (36) | 41.73" | 17.91" | 25.20" | 27.17" |
M (38-40) | 43.70" | 18.62" | 25.59" | 27.95" |
L (42) | 45.67" | 19.33" | 25.98" | 28.74" |
XL (44) | 47.64" | 20.04" | 26.38" | 29.53" |
Shipping & Delivery
Our priority is your peace of mind. Each order is carefully prepared and dispatched within 24 hours, with complimentary delivery as standard.
You will be kept informed every step of the way, ensuring a seamless experience from our hands to yours
Size Guide
Our pieces are designed true to size, created to align with your natural fit. Each silhouette is considered to complement your form with ease - whether chosen for a relaxed drape or a more defined line.
Returns
Your confidence is central to us. Every piece comes with a 14-day satisfaction guarantee, allowing you to experience it without concern.
If a return is needed, the process is effortless and considerate - designed with care for you, and with respect for our environment.
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Frequently asked questions
Do you ship internationally?
At the moment, we only ship within the United States. All orders include free shipping as standard.
How long will my order take to arrive?
Orders are dispatched within 1 business day, with tracking details provided upon shipment. Delivery typically takes 3–10 business days, depending on location.
What is your return policy?
We offer a 14-day return window. Items must be unworn, unwashed, and in original condition. Simply email us at support@ompious.com, and our team will guide you through the process.
How do I choose my size?
Our size charts follow standard U.S. sizing. For a more relaxed fit, order your usual size. For a sharper, tailored look, consider sizing down.
How can I contact you?
For assistance, email us at support@ompious.com or use our contact page. Our team will respond promptly.