Stack height refers to the thickness of material between your foot and the ground. Barefoot shoes naturally have lower stack heights (usually no more than ~15mm) than conventional shoes for two key reasons:
1. A thinner sole increases flexibility, allowing your foot to move naturally.
2. Less material gives you a better feel for the ground, enhancing sensory feedback.
Stack height varies depending on the type of shoe. For example, a barefoot hiking shoe typically has a higher stack height than a barefoot training shoe—you need extra cushioning to help protect your feet from rocks and rough terrain. For comparison, a pair of Hoka's has at least 30mm stack height, if not more!
A helpful guide:
• Ultra Minimal (<5mm): As barefoot as it gets. Maximum ground feel — not for everyone.
• Minimal Cushion (5–10mm): You’ll feel every pebble. Great for purists and strong feet.
• Low Cushion (10–15mm): Ground feel without the ouch. A solid baseline for hiking and daily wear.
• Moderate Cushion (15–20mm): Adds protection for trails, travel, or long days on your feet.
• High Cushion (20mm+): Barefoot in shape only — wide toe box and zero drop, but plenty of padding.