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SIERRA DESIGNS / Dog T-Shirt
This special collaboration between SIERRA DESIGNS and GOOD ON features deep, rich tones created by garment dyeing and an irresistibly charming dog graphic.
The design is inspired by the beloved dog of George Marks, one of the founders of Sierra Designs, and is printed on a GOOD ON body to create a truly unique piece.
Made with premium American cotton and built for durability, it holds its shape even after repeated washing and drying. Over time, the fabric develops a richer character, allowing you to enjoy its evolving texture for years to come.
natural
yellow
black
natural
yellow
black

SIERRA DESIGNS
Founded in California, USA in 1965. The brand offers items that blend practical functionality with current fashion trends, made for those who enjoy incorporating outdoor elements into their style.
GOOD ON
Founded in Japan with the aim of creating T-shirts inspired by the good old American-made products—tough, durable pieces that develop more character with wear over time. The brand offers T-shirts, sweatshirts, and more, crafted with carefully selected high-quality American cotton.
A Comfortable Thickness That Naturally Adapts to the Skin
Made from 100% American cotton open-end yarn using 18-count single yarn, this jersey fabric offers excellent durability and flexibility. Knitted to a comfortable weight, it naturally conforms to the skin for a soft, easy-wearing feel.
High-Quality American Cotton Recognized Worldwide
Good On uses COTTON U.S.A., a mark awarded to products made with more than 50% high-quality American cotton recognized worldwide. Certified by Cotton Council International and only given to cotton that meets Japan’s strict quality standards, it represents a trusted standard of quality.
Enjoy the Character That Develops Over Time
With repeated wear and washing, you can enjoy the way the color gradually fades. The longer you wear it, the more it develops a rich, vintage-like character.
A catchy piece featuring an adorable dog illustration by artist Hiroaki Ushioda.
The dog is modeled after the beloved pet of George Marks, one of the founders of Sierra Designs.
The neckline features a binder neck construction, helping prevent stretching and loss of shape. Designed to withstand regular wear and washing, it offers lasting durability.
The sides are finished with a seamless tubular body. This creates a clean silhouette from the side while preserving a comfortable feel, reflecting thoughtful attention to detail.
One of the key features is the sizing, designed to suit Japanese body proportions. Carefully tailored dimensions and precise cutting throughout deliver a comfortable, well-balanced fit.


SIZE
※Check out the size guide for more accurate measurements.
Staff comment
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●Staff Height / Weight: 165cm / 64kg Worn Size: M Body Type: Slim (narrow shoulders) Fit: Just right Length: Just right I wore size M. The body does not feel baggy, and even with my slim build and narrow shoulders, it fits the body surprisingly cleanly. The length is also neat, making it easy to use as an inner layer. |
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●Staff Height / Weight: 171cm / 70kg Worn Size: M / L Body Type: Standard Fit: Just right / Relaxed Length: Just right I wore sizes M and L. If you want a neat, true-to-size fit, size M is the right choice, but personally I prefer size L, which gives it the slightly relaxed feel that Good On T-shirts are known for. Size L creates a comfortable sense of ease through the body. |
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●Staff Height / Weight: 177cm / 73kg Worn Size: L / XL Body Type: Standard Fit: Just right / Relaxed Length: Just right Size L gives a just-right fit with no tightness, while size XL creates a modern relaxed fit that makes the most of the extra room in the shoulders and body. |
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●Staff Height / Weight: 181cm / 78kg Worn Size: L / XL Body Type: Sturdy (broad shoulders) Fit: Just right / Relaxed Length: Just right I wore sizes L and XL. Size L feels slightly slimmer through the body, creating a clean and smart just-right fit. For my sturdy build and broad shoulders, size XL is the best fit, as it provides plenty of room through the body. |
SPEC
| Materials | 100% cotton |
|---|---|
| Country of Origin | JAPAN |
| Model Wearing | Wearing size L (178cm/70kg) |
| Care Instructions | ※Please note that the colours may look different from the real thing depending on your monitor environment. |
| Weight | 270g |
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