1/19
159cm / 1 size
Rio Optimum Paper Relax T-Shirt (C3fit / Unisex)
Grayish White / 0
$121.52
Skip to product information
Rio Optimum Paper Relax T-Shirt (C3fit / Unisex)
$121.52
Shipping calculated at checkout.
The Re-Optimum series, developed using photonic technology for recovery, is a collection loved by top athletes across various sports. The photonic technology harnesses the natural warmth generated by the wearer's body temperature (far infrared rays emitted from the human body), providing sustained warmth. It can maintain a comfortable warmth close to body temperature, which is essential for relaxation and comfort. The apparel, made from moisture-absorbing paper yarn fibers, has excellent moisture-wicking properties, keeping skin dry and is perfect for the hot and humid summer. It is blended with cotton and polyester for a pleasant texture. Even when outdoor temperatures are high and indoor air conditioning is strong, it remains comfortable to wear. The short-sleeved T-shirt features a relaxed and slightly loose silhouette. The collar is designed to resist deformation after multiple washes and follows the stretch of the fabric. It is recommended for loungewear and as an outfit for post-sports activities. From the Spring/Summer 2024 model, the cotton component is made with organic cotton (100% organic raw material). *The Re-Optimum series was developed with the collaboration of Dr. Noriyuki Shimizu, an honorary professor at Osaka Metropolitan University, who has over 30 years of research in environmental adaptation and sleep in the field of health and medical science.
Size Chart
| Length | Width | Shoulder Width | Sleeve Length | Hem Width | Cuff Width | |
|---|---|---|---|---|---|---|
| 0 | 63 | 53 | 48 | 21 | 53 | 19 |
| 1 | 65 | 55 | 50 | 22 | 55 | 20 |
| 2 | 67 | 57 | 51 | 23 | 57 | 20 |
| 3 | 69 | 59 | 53 | 24 | 59 | 21 |
| 4 | 71 | 61 | 55 | 25 | 61 | 21 |
All measurements are in (cm).
Because outer measurements are taken by hand, slight variations (about 1–2 cm) may occur depending on the product.
Measurement methods may vary depending on the material, product shape, and whether accessories are included.
To confirm the best fit, we recommend measuring a similar item you own and comparing it with the garment measurements.
Shipping Policies
Shipping Area
Products are shipped directly from Japan and are currently available for delivery to the United States only via EMS.
Orders with delivery addresses outside the United States will be cancelled. Thank you for your understanding.
Delivery Time
- Processing time: 5–10 business days
- Shipping time: 7–14 business days
Delivery may be delayed due to customs inspections, natural disasters, or postal strikes.
Shipping Costs
Shipping fees vary by destination and will be displayed at checkout.
Order Tracking
Your tracking number will be included in the dispatch confirmation email.
For U.S. customers, track your order here:
https://tools.usps.com/go/TrackConfirmAction_input
Taxes
Buyers are responsible for all applicable local, state, federal, and international taxes, including any sales or import taxes related to their order.
Duties and taxes are not prepaid and may be charged by customs upon delivery.
We are unable to declare a lower value or mark orders as gifts on customs forms.
Refund Policies
Returns & Exchanges
Returns are not accepted for overseas orders due to customer preferences, including incorrect sizing or personal interpretation of the product.
An exchange or refund will be offered only if the item received is incorrect or has a defect caused by us.
Please contact us within 3 days of delivery, including your order number and a description of the issue. Approved cases will have return shipping covered by us.
Requests for defective item exchanges must be submitted within 5 days of delivery based on the tracking record. Returns will not be accepted without prior email approval.
We Cannot Accept Returns or Exchanges If:
- The request is due to personal reasons
- Import duties or taxes are refused
- More than 3 days have passed since delivery
- The item has been worn, used, or washed
- The item has odors, stains, or damage caused by use
- Original accessories, packaging, or boxes are missing
- The item has been altered or repaired
- The item was purchased as a sale or discounted product
Looks
2/19
162cm / 2 size
3/19
163cm / 3 size
4/19
163cm / 2 size
5/19
163cm / 2 size
6/19
165cm / 1 size
7/19
171cm / 2 size
8/19
173cm / 4 size
9/19
173cm / 3 size
10/19
173cm / 3 size
11/19
174cm / 2 size
12/19
175cm / 2 size
13/19
175cm / 3 size
14/19
177cm / 3 size
15/19
179cm / 4 size
16/19
180cm / 3 size
17/19
181cm / 2 size
18/19
182cm / 3 size
19/19
182cm / 4 size
Reviews
Summer loungewear
This is the best piece to wear in an air-conditioned room. You can stay comfortable even at a slightly lower temperature.
Summer is fine
Texture is
This is just my personal opinion, but I had imagined it to have a smooth texture, but it was a bit different, so I returned it.
The color was good.
Mogu
Materials & Technologies
1/2
GREEN MATERIAL
Environmentally friendly materials such as recycled materials and plant-based materials.
2/2
Photoelectron
Photoelectron refers to fibers that utilize far-infrared rays emitted by the body, through the action of special ceramics, for thermal insulation. By mixing it with various materials, it demonstrates effective thermal insulation properties.