We offer sizes XS–XL across most styles. Each product page includes a size guide with detailed measurements. If you're between sizes, we generally recommend sizing up for a more relaxed fit or sizing down for a fitted look. Feel free to reach out if you need help choosing.

Yes, our pieces are designed to run true to size. Refer to the size guide on each product page for the most accurate fit. If you have specific questions about a style, feel free to contact us.

We prioritize high-performance, sustainable fabrics across both of our lines:

• Sunnysideup Swimwear: Made in Bali using ECONYL® and REPREVE® — high-quality regenerated nylon fibers created from ocean plastic and post-consumer waste.
• saachi Activewear: Crafted mostly from premium recycled nylon, lycra, or polyamide — designed to feel buttery-soft, breathable, and supportive as you move.

You can find the exact fabric composition and care instructions on each individual product page.

To keep your items looking and feeling like new, we recommend following these care guidelines:

Sunnysideup Swimwear

• Rinse immediately: Rinse with cold, fresh water after each wear (especially after exposure to chlorine or saltwater).
• Hand wash preferred: Wash gently by hand using a mild detergent — avoid harsh chemicals, bleach, or fabric softeners.
• Dry carefully: Gently squeeze out excess water (do not wring or twist) and lay flat to dry in the shade. Avoid direct sunlight and high heat.
• Do not tumble dry or iron.

saachi Activewear & Apparel

• Machine wash cold: Wash on a gentle, cold cycle with like colors.
• Use mild detergent: Avoid bleach and fabric softeners, as they can break down performance fibers and stretch.
• Air dry: Lay flat or hang to air dry. Do not tumble dry.
• Ironing: Avoid ironing directly on any printed, rubberized, or embroidered details.

Tip: Full care instructions and fabric blends are also printed directly on the inner garment label.

Some styles are restocked seasonally, while others are limited runs. For general emails about full restocks, please sign up to our newsletter. Keep an eye on our socials to be the first to know about any restocks and launches.

We accept all major credit and debit cards (Visa, Mastercard, Amex), GooglePay, ApplePay, and Shop Pay. Customers in Hong Kong can also pay via PayMe. Payment is processed securely at checkout.

Please allow up to 3 working days for Hong Kong orders and 7 working days for international orders to be dispatched before contacting us. You will receive an email notification once your order is out for delivery.

We process orders quickly, so changes may not always be possible. Contact us at hello@sunnysideups.com or DM us on Instagram as soon as possible and we'll do our best to help before your order is fulfilled.

Enter your discount code in the designated field at checkout before completing your order. Only one code can be applied per order. Codes cannot be applied after an order has been placed.

Please check your spam or junk folder first. If you still can't find it, contact us at hello@sunnysideups.com with your name and the email used at checkout and we'll resend it.

Yes — simply input your SF locker code in the delivery address field at checkout and we'll deliver directly to your selected locker.

Yes! We ship worldwide. We are also happy to offer free delivery and shipping on all orders meeting the minimum spend. Please find our shipping information and costs on our Shipping & Returns page.

Please allow up to 3 working days for Hong Kong orders and 7 working days for international orders to be dispatched before contacting us. You will receive an email notification once your order is out for delivery.

Duties, taxes, and fees vary by destination. For many countries, all applicable duties and taxes are included in the price you see at checkout — what you see is what you pay, with no surprises at the door. For destinations where this isn't the case, any applicable charges will either be shown at checkout or collected by your local customs upon delivery. Any duties or taxes assessed upon delivery are the responsibility of the recipient and are not refundable.

If duties and taxes are not shown at checkout for your destination, all import duties, customs charges, taxes, and admin fees (if applicable) will be the responsibility of the customer. These costs vary by country and are outside of our control.

We offer exchanges for another item from the same brand (i.e, Sunnysideup with Sunnysideup, saachi with saachi) in your preferred colour and size within 7 days of receiving your items, subject to stock availability. Items must be returned in their unused condition with tags still attached. To start the process, please email us at hello@sunnysideups.com or via DM on Instagram to request an exchange. Please note we do not cover shipping costs for the exchange item and the cost to re-ship the items. Shall there be a discrepancy between the initial order and the exchanged item, the customer will need to bear the additional costs.

We only offer refunds for faulty or defective items within 7 days of receiving your order. To start the process, please email us at hello@sunnysideups.com or via DM on Instagram and we will arrange for the return shipment.

Exchanges are not applicable for used items, sports bottoms or swimwear (including bikini tops and bottoms) due to hygiene reasons. Exceptions apply for items found to be defective upon arrival.

You can reach us by email at hello@sunnysideups.com or via DM on Instagram at @ssu.studios or @saachi_active. We aim to respond within 1–2 business days.

Our team is available Monday to Friday, 10am–6pm HKT. Messages received outside of these hours will be responded to on the next business day.