Pack Mule vs V-Notch Shorts: 5" or 3.75" for Training
By BOA | Running Shorts & Apparel | Made in the USA | Published: 2026-11-02
Category: Comparisons
Compare the Men's 5" Pack Mule Short and 3.75" V-Notch on storage, liner, and length so you can pick the right pair for long runs or all-around training.
Quick answer
Choose the Men's 5" Pack Mule Short if you need to carry fuel, keys, and a phone on long runs or gym sessions. Choose the Men's 3.75" V-Notch if you want a lighter, shorter all-around short with a simple key pocket and no compression liner.
Storage is the real dividing line
The Pack Mule is built around carrying capacity: two Zero Bounce compression pockets, two exterior energy hip holster pockets, and a zippered pocket with an internal key loop. That is a lot of places to stash gels, a phone, or keys without holding anything in your hands.
The V-Notch keeps it minimal with a single key pocket. If you run with a handheld bottle, belt, or vest, the extra pockets on the Pack Mule may be redundant. If you prefer to leave the vest at home, the Pack Mule replaces much of that storage.
Liner style changes the feel
The Pack Mule uses a Constrictor Half Tight liner, which provides compression through the upper thigh. The V-Notch uses a lightweight knit liner. Neither is objectively better; the half-tight liner suits runners who like a locked-in feel, while the knit liner feels less restrictive and is easier to forget you are wearing.
If you have never run in a half-tight liner, test the Pack Mule on a short run first. The compression is noticeable, and some runners prefer it only for longer efforts.
Length and fabric: 5" vs 3.75"
The 5" inseam on the Pack Mule covers more thigh and reduces chafing risk for runners with thicker thighs or longer strides. The 3.75" V-Notch sits higher on the leg and feels cooler and less restrictive, which many runners prefer for speed work and hot weather.
Both shorts use BOA's Polymicro Fabric, which is moisture wicking. The V-Notch adds a V-Notch side seam for a wider range of leg motion. The Pack Mule's catalog description does not list a V-Notch seam, so if side-seam freedom is a priority, the V-Notch is the clearer choice.
Key trade-offs to weigh
- Storage vs simplicity: The Pack Mule gives you four pocket zones plus a key loop; the V-Notch gives you one key pocket. Pick the Pack Mule only if you will actually use the extra storage on most runs. If you already run with a vest or belt, the V-Notch avoids redundant pockets.
- Compression liner vs knit liner: The Pack Mule's Constrictor Half Tight liner adds compression and support; the V-Notch's knit liner is lighter and less restrictive. Neither is more correct—match it to how much compression you like on your thighs. First-time half-tight liner wearers should test the Pack Mule on a short run before a long one.
- 5" coverage vs 3.75" freedom: The 5" inseam reduces thigh exposure and chafing risk; the 3.75" inseam feels cooler and less restrictive. Runners with thicker thighs or longer strides often prefer the 5" length; speed work and hot-weather runners often prefer the 3.75". If you are unsure, start with the length of shorts you already reach for on most training days.
Product facts at a glance
- Men's 3.75" V-Notch: 3.75" inseam with a V-Notch side seam, elastic waistband with drawcord, key pocket, moisture wicking Polymicro Fabric, and a lightweight knit liner. A shorter, simpler short that moves freely and suits runners who carry little and prefer a light liner.
Men's 3.75" V-Notch - Men's 5" Pack Mule Short: 5" inseam with a Constrictor Half Tight liner, two Zero Bounce compression pockets, two exterior energy hip holster pockets, and a zippered pocket with internal key loop that doubles as a hang loop. Built for long runs and workouts where you need to carry fuel and essentials without a vest or belt.
Men's 5" Pack Mule Short
Which short fits your training
Best for
- Runners doing long runs or workouts who want to carry gels, phone, and keys without a vest
- Gym sessions and cross-training where pockets matter
- Runners who prefer a compression half-tight liner and more thigh coverage
Not for
- Runners who already carry a vest or belt and want a minimal short
- Runners who dislike compression liners or want maximum leg freedom
- Hot-weather speed sessions where a shorter inseam feels cooler
