Three inches, a split hem, and a compression liner built in underneath. Cut for stride first: nothing catches at the top of the leg, and the shell moves independently of the liner so the two never fight each other.
He wears a Large in these. When he wants a looser fit, he goes XL. These run true to size, so match the size chart rather than sizing down.
Every inch of fabric below the hip is another inch that can catch, bunch or drag. This is the shortest cut we make, and it exists for the days you are chasing a number rather than dressing for one.
The side seam opens rather than closing off the leg. At the top of the stride the hem gets out of the way instead of pulling across the quad, which is the whole reason this cut exists.
A compression liner underneath, an unattached shell over the top. The liner holds, the shell floats. Neither drags the other around, and there is nothing separate to buy or forget.
Set into the waistband and zipped shut. Enough for a key, a card, or a gel, sitting flat against the back where it will not swing.
Wide enough to sit still without a drawstring cutting in, and low profile enough to run under a heart rate strap without stacking up.
Detail 01The Whole Short
Detail 02Mark + Split Hem
Detail 03Shell Over Liner
The same reason it works on the road works on a sled. Nothing at the top of the leg, nothing to grab a rig, nothing riding up between reps.
What it was cut for. Three inches, split hem, liner underneath, and no seams anywhere your stride is going to find them.
Career SOF veterans, Marines, runners, and lifters. Read every one of them, including the ones telling us three inches is not for everybody.