The Flow Trainer was the first shoe in this journey, the catalyst for everything that followed.

Inspired by the timeless German army trainer, its iconic toe box has been reworked into a wider, ergonomic form, allowing the foot to spread and move naturally. After seven rounds of sampling and wear testing, this shape became the foundation of the design, balancing stability and comfort while preserving a clean, classic silhouette.

A continuous curve runs through the lace panel and across the upper, following the natural shape and motion of the foot. Hidden laces keep the profile streamlined, while soft leather gently cinches around the ankle, offering security without restriction. These details hold the foot in place while allowing it to move freely. The shoe sits on an ultra thin sole, keeping the foot close to the ground and allowing for maximum feel underfoot.

The Flow Trainer is approached as both a functional shoe and an object of expression. Designed with the care of a sculptural piece, every line, proportion, and material is chosen with intention. It’s made to be worn, lived in, and appreciated over time.

Built to move effortlessly across environments, from walking and training to travel and social settings, the shoe adapts to everyday life. With wear, the leather softens and moulds, becoming more personal and more beautiful over time.

A shoe designed to flow with life.
Functional, expressive, and timeless.
Built for every occasion.

• 100% leather and brushed suede upper
• Fully Calfskin lined
• Elasticated collar
• Removable leather insole
• Vibram natural rubber outsole
• Embroidered Hart branding
• Handmade in Portugal
• Comes with extra pairs of laces to choose from

If you are between sizes, we suggest sizing down. These shoes fit wide at the toe to accommodate free range of movement and will mold to your feet over time. The sizes might not correlate with your normal size, so we recommend measuring your foot and viewing our size guide for accuracy.