SIERRA DESIGNS
Founded in 1965 in California, USA. Sierra Designs offers products that blend functionality with fashion trends tailored to those who enjoy incorporating outdoor elements into their style.



GOOD ON
Established in Japan, aiming to create T-shirts that develop a vintage look as they are worn, inspired by the tough, aging T-shirts of old American products. They offer T-shirts and sweatshirts made from high-quality American cotton.





Just the Right Thickness for Comfort
Utilizes 100% American cotton yarn (18 single yarn). The fabric is a jersey material that is comfortable and durable, with good stretch and a thickness that naturally conforms to the skin.

High-Quality American Cotton Recognized Worldwide
Good On uses "COTTON U.S.A", a mark given to products that use high-quality American cotton recognized worldwide. It is certified by the CCI International Cotton Council and meets Japan's strict quality standards, serving as a "mark of trust" for products.

Enjoy Aging Over Time
Repeated wearing and washing will further fade the colors, allowing you to enjoy the aging process. The more you wear it, the more it develops a vintage-like expression.





A cute dog illustrated by Hiroaki Ushioda, this popular dog from the sticker series currently on sale is modeled after the beloved dog of one of Sierra Designs' founders, George Marks.



The neck features a taco binder specification to prevent sagging. It's designed to withstand repeated wear and washing.





The sides are finished with seamless round bodies. This detail ensures a beautiful silhouette from the side and doesn't compromise comfort.





It may look simple, but the key is the sizing tailored to Japanese body types. By optimizing the dimensions and cutting for all parts, it achieves a comfortable fit.