Siena De Los Santos × Rincon Sports Nutrition | Postmark Relay Long Sleeve - White
| S | M | L | XL | 2XL | |
|---|---|---|---|---|---|
| Width, in | 17.99 | 20.00 | 22.01 | 23.98 | 25.98 |
| Length, in | 27.99 | 28.98 | 30.00 | 30.98 | 32.01 |
| Sleeve length, in | 25.00 | 25.51 | 25.98 | 26.50 | 27.01 |
| Size tolerance, in | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
Siena De Los Santos × Rincon Sports Nutrition — the Postmark Relay Long Sleeve pairs Siena’s black Postmark on the center chest with the full-color Rincon Sports Nutrition wordmark printed vertically down the left sleeve. The back and right sleeve stay plain.
An everyday cotton layer for warmups, cool evenings and time between sessions. This is a classic cotton long sleeve, with printed artwork.
Details
• Gildan 2400, printed by SwiftPOD in the United States.
• White: 100% cotton; medium-weight 6 oz/yd² (203 g/m²).
• Classic fit, tubular knit without side seams, shoulder tape and sewn-in label.
• Runs smaller than usual. Check the size chart before choosing; available in S–2XL.
• White fabric may have a slightly off-white appearance.
• Chest artwork: 4.5 inches wide. Left-sleeve wordmark: approximately 8 inches long, oriented vertically. Artwork is scaled for smaller sizes.
Care
Machine wash cold (maximum 30°C / 90°F). Use non-chlorine bleach only when needed. Tumble dry on medium. Do not iron or dry clean.
Made to order. Shipping and applicable tax are calculated at checkout.
Without side seams
Knit in one piece using tubular knit, it reduces fabric waste and makes the garment more attractive
Ribbed knit collar with seam
Ribbed knit makes the collar highly elastic and helps retain its shape
Shoulder tape
Twill tape covers the shoulder seams to stabilize the back of the garment and prevent stretching
Fiber composition
Solid colors are 100% cotton; Safety and Heather colors are 50% cotton, 50% polyester; Sport Grey is 90% cotton, 10% polyester.
Age restrictions
For adults
Other compliance information
Meets the EU REACH requirements.
DTF inner neck labels
The inner neck labels offered by a variety of print partners are printed using the Direct-to-Film (DTF) print method, while the rest of the prints are done with the Direct-to-Garment (DTG) method.
Fabric
100% cotton fabric for a thicker vintage feel
Machine wash: cold (max 30C or 90F); Non-chlorine: bleach as needed; Tumble dry: medium heat; Do not iron; Do not dryclean.
Accurate shipping options will be available in checkout after entering your full address.
Any goods purchased can only be returned in accordance with the Terms and Conditions and Returns Policy.
We want to make sure that you are satisfied with your order and we are committed to making things right in case of any issues. We will provide a solution in cases of any defects if you contact us within 30 days of receiving your order.
See terms and conditions© 2026 Siena De Los Santos