The Streamline Training 3" Shorts are made to keep you light, cool and ready to move. With a 3-inch inseam and breathable running poly fabric, these shorts are all about freedom and function during your toughest sessions. Designed with side splits for added mobility and an encased elastic waistband with drawcords for a secure feel. The invisible zip pocket gives you storage without the bulk, while the subtle front logo keeps the branding clean and athletic.
Product Features
- True to size
- 3" Inseam
- Side splits
- Invisible zipper pocket
- Encased elasticated waistband with drawcords
- Muscle Nation logo on front leg
- 88% Polyester 12% Elastane
- Running Poly Fabric
Size Guide
Model: Samuel - 171cm, wears size M
Sizes below are approximate. Compare with a garment you already own and like. If between sizes, size up for a relaxed fit or down for a tighter fit.
| Size | US | Waist (in) | Waist (cm) |
|---|---|---|---|
| XXS | 0 | 24–25 | 61–64 |
| XS | 2 | 26–27 | 66–69 |
| S | 4 | 28–29 | 71–74 |
| M | 6 | 30–31 | 76–79 |
| L | 8 | 32–34 | 81–86 |
| XL | 10 | 35–37 | 89–94 |
| XXL | 12 | 38–40 | 97–102 |
How to measure
- Waist: measure around narrowest part of waist.
- Hips: measure around fullest part of hips and bum.
- Inseam: measure inside leg from crotch to ankle.
- Chest: measure around fullest part of chest.
Fit tips
- Compression pieces should feel snug but not restrictive.
- Training tops and tees are designed for movement.
- For a looser feel, go one size up.
Returns
We hope you love your new items! If you're not 100% satisfied, return within 30 days for a full refund or exchange. Sale items are final.
Shipping
- US — Free over $130, otherwise $9.99
- NZ — $10.00
- USA / UK — $12.00
- Europe — $14.00
Reviews
- ★★★★★
Excellent quality
Honestly the best gym apparel I've owned. Fit is true to size and the fabric holds up after dozens of washes.
Sarah M. · 12 Mar 2026
- ★★★★★
Worth every dollar
Bought two more in different colours after the first one. Comfortable for lifting and running.
Daniel R. · 28 Feb 2026
- ★★★★★
Great fit, slightly long
Love the cut and the colour is exactly as pictured. Length runs a touch long for me but otherwise perfect.
Priya K. · 14 Feb 2026
- ★★★★★
MN never disappoints
Quality is on par with my other MN Generation pieces. Shipping was fast and packaging was on point.
Marcus T. · 02 Feb 2026
