Custom Gym Shorts Made for Your Brand

Training And Running

5–7-inch training shorts use a relaxed shell, side splits, and two hand pockets for general gym wear. A brief or compression liner improves support but raises sampling and sewing complexity. 3–5-inch running shorts favor a lighter, narrower silhouette, rear zip pocket, and liner. They suit runners, yet limited storage and shorter coverage narrow the audience.

Court And Compression

7–11-inch basketball shorts need a roomy leg opening, deep side pockets, and no liner for layering. Their broad lifestyle appeal trades off against speed-focused performance. 5–9-inch compression shorts use a close fit, flatlock seams, and a phone pocket or waistband pocket. They target training and cycling users but require accurate grading to avoid restrictive fit.

Hybrid And Lounge

7–9-inch hybrid board shorts combine a woven shell, secure pockets, and optional liner for gym-to-water use. Quick-dry positioning expands use cases but adds fabric and trim decisions. 7–10-inch lounge styles prioritize a relaxed cut, elastic waist, drawcord, and hand pockets. They reach athleisure buyers, although softer styling may dilute technical credibility.

Performance Fiber Choices

100% polyester is economical, quick-drying, and highly print-friendly; recycled polyester offers similar performance but can carry a higher fabric cost. Nylon feels smoother and usually withstands abrasion better, making it a strong choice for trail, court, and premium training shorts.

Stretch And Coverage

5–12% spandex or elastane improves mobility and recovery in fitted training shorts; higher percentages require opacity checks during squats. A 90/10 polyester-spandex blend is a practical starting point for four-way-stretch products, while cotton blends provide a softer, slower-drying hand.

Mesh, Decoration, And MOQ

120–150 GSM mesh works well for pocket bags, side panels, and ventilation, but needs lining or placement control to prevent show-through. Screen print and heat transfer adhere reliably to polyester, whereas nylon needs compatible inks; extra fabric colors, bonded layers, or specialty recycled yarns can raise cost and constrain a 100-unit-per-style-and-color launch.

Print Methods And Artwork

1- to 3-color plastisol screen prints suit cotton jersey, French terry, and most fleece-facing panels; they offer opaque color but can feel heavier on lightweight fabric. Supply vector AI, PDF, or EPS artwork with Pantone references and final print dimensions. Full-color heat transfer suits small runs, names, and detailed gradients, but large solid transfers can reduce stretch and breathability. Dye sublimation requires polyester-rich light fabric and becomes part of the fiber, yet cannot reproduce white ink on dark goods.

• Screen printing: lowest unit cost at higher volumes
• Heat transfer: flexible for variable artwork
• Sublimation: best for all-over polyester graphics

Raised And Trim Branding

3D embroidery, flat embroidery, and silicone badges create durable, premium marks on waistband-adjacent panels or woven shells. Dense stitches can pucker lightweight performance knits, while silicone requires a stable, heat-compatible application area. 2-piece woven labels provide crisp small type where embroidery would lose detail; use a folded edge or soft backing to avoid skin irritation. Custom drawcords, metal tips, contrast panels, and branded snaps add perceived value but introduce color matching, trim MOQ, and assembly costs.

• Embroidery: strongest texture, higher stitch cost
• Silicone badge: clean dimensional logo
• Woven label: sharp details at small scale

Packaging And Approval

100-unit capsule orders benefit from one standardized polybag, size sticker, hang tag, and carton mark instead of multiple bespoke components. Custom mailers, tissue, and printed boxes increase setup, freight volume, and damage risk. 1 approved strike-off or pre-production sample should confirm color, placement, adhesion, label feel, and wash behavior before bulk. Junsheen can coordinate labels, trims, decoration, packaging, and final packed-goods inspection within one production flow.

• Approve Pantone and placement on the actual fabric
• Test stretch prints after laundering
• Keep trim specifications with repeat-order records

Seams And Stitch Density

Three seams deserve close inspection: inseams, side seams, and crotch joins. Flatlock reduces chafing on next-to-skin styles, while overlock seams need secure coverstitching where stretch and abrasion are highest. Eight to 12 stitches per inch is a useful starting review range for many knit constructions. Check for skipped stitches, seam grin, loose thread tails, and uneven seam allowance before approving bulk.

• Stretch seams manually at the crotch
• Check both legs for matching seam shape
• Inspect inside seam ends for clean trimming

Stress Points And Pockets

Four high-load points commonly need reinforcement: pocket openings, pocket corners, drawcord exits, and the base of a fly or side split. Bartacks should be dense, aligned, and free of fabric damage. Two pocket checks prevent common returns: insert a phone-sized weight and pull the opening gently. Confirm pocket bags lie flat, edges are enclosed, and the opening does not distort the short.

Waistband And Liner Performance

Ten stretch-and-release cycles can reveal weak waistband recovery before production. Measure the waistband relaxed, stretched, and after recovery; it should return evenly without rolling, twisting, or permanent extension. Two drawcord exits should be securely anchored and smoothly finished. For lined shorts, inspect leg openings, crotch joins, and liner attachment so edges do not rub, bind, or show through.

Wash Tests And Tolerances

One pre-production wash test should confirm shrinkage, spirality, color transfer, and hand feel. Record the wash method and compare measurements before and after, especially on cotton-rich jerseys and dark colors. Plus or minus 1 cm is a common review tolerance for many key short measurements, subject to size and specification. Check outseam, inseam, waist, hip, leg opening, and rise against the approved graded chart.

• Rub dark fabric against a white cloth
• Compare paired legs after washing
• Measure samples laid flat consistently

Verify Relevant Product Experience

2–3 comparable shorts samples reveal more than a catalog: inspect inseam consistency, waistband recovery, pocket construction, stretch seams, and wash results. 100-unit flexibility matters only when the factory can maintain the same pattern, fabric, and trim controls as volume grows.

• Ask for comparable style photos and measurement sheets.
• Confirm who creates patterns and graded size sets.
• Request a named production contact, not a marketplace account.

Audit Materials And Sampling

180–260 GSM performance knits, mesh liners, and stretch wovens should be proposed with fiber content, weight, stretch direction, color availability, and lead time. 1 approved pre-production sample should lock Pantone color, placement, measurements, labels, and packing before bulk cutting. Request OEKO-TEX, GOTS, BSCI, or WRAP evidence only where the supplier claims applicable certification.

• Ask what changes trigger a revised quotation.
• Confirm sample fees, revision limits, and approval timing.
• Obtain fabric swatches before bulk material commitment.

Test Production Transparency

80,000-plus monthly capacity can support repeat programs at Junsheen, yet buyers should still require a written production calendar for their own style, fabric, and decoration method. 3 checkpoints—inline construction, measurement review, and final packed-goods inspection—should be defined before a deposit is sent.

• Ask for realistic sample and bulk lead times.
• Confirm the quality standard and defect-resolution process.
• Request a line-item quotation covering fabric, trims, decoration, packing, and freight terms.

Distinguish OEM From Reseller

5 traceable records—tech-pack feedback, pattern revisions, fabric specifications, inspection reports, and packing lists—indicate an operating manufacturing system. 1 capable OEM partner can explain seam choice, grading, sourcing alternatives, and capacity constraints directly. A reseller commonly avoids factory-specific answers, offers vague photos, or cannot arrange sample corrections.

Approve Materials In Hand

180–220 GSM performance knit can look identical online yet differ in stretch recovery, opacity, and pilling resistance after washing. 2 swatches per candidate fabric, washed and stretch-tested, give buyers a practical basis for selecting composition, weight, and color.

• Request composition, GSM, usable width, and shrinkage data
• Check light-color opacity under movement
• Approve a physical Pantone lab dip

Lock The Technical Brief

1 tech pack should state measurement points, grade rules, inseam, rise, pocket construction, stitch type, and approved trims. ±1 cm body tolerances and decoration placement tolerances should be agreed before the size set; vague ‘standard fit’ instructions invite revisions.

• Attach front, back, and detail artwork
• Name the base size and grade increments
• Approve a fit sample on the target wearer

Control Complexity And Timing

2–3 colors and one decoration method are safer for a first run than combining bonded pockets, silicone print, multiple panels, and custom hardware. 7–14 days for sampling and 30–45 days for bulk are planning ranges, not promises; confirm material availability and production slots in writing.

• Match silicone or heat transfers to suitable fabric
• Compare quotes against identical fabric, trims, packaging, and quantities
• Use a critical-path calendar for approvals and shipping

Define Customer And References

Two customer decisions come first: training use and price position. Build a reference board covering inseam, liner, pocket layout, rise, logo scale, and three competing retail prices. Three target colors are usually enough for a first capsule. Identify non-negotiable brand cues before asking a factory for alternatives.

Build A Production Tech Pack

One complete tech pack should specify graded measurements, construction callouts, Pantone colors, artwork files, label placements, and packaging. Include front, back, and detail views with tolerances for critical points such as waist and inseam. Two revision rounds are cheaper than correcting bulk goods. Freeze artwork dimensions and decoration methods before sample approval.

Approve Materials And Samples

180–250 GSM performance knit is a practical starting range for many training shorts, subject to opacity and recovery testing. Approve fabric swatches, trims, and color standards before the first prototype. One fitted sample and one wear-tested size set reveal different risks. Test squat opacity, pocket bounce, drawcord security, wash shrinkage, and seam comfort.

Release Bulk And Delivery

100 units per style and color can support a capsule launch with Junsheen, while graded patterns from XS through 3XL require sign-off before bulk cutting. Approve a pre-production sample that matches the sealed fabric, trims, print, and measurements. Four dates should be confirmed in writing: bulk completion, final inspection, balance payment, and freight cutoff. Reserve shipping capacity around the retail launch date, allowing time for customs and receiving checks.