Piped Stretch Short Without Built-In Brief Length: 4.5"

Verified claims

Permanence

Odor control lasts the garment's lifetime and survives weeks of sweaty wear without washing.

Safety

Polygiene holds bluesign and Oeko-Tex certifications and is skin-safe for prolonged wear.

Environmental impact

Polygiene reduces environmental footprint by a third through less washing; uses no extra resources in application.

Prestige

At $59 CAD, these shorts include Polygiene, a feature typically reserved for premium outdoor brands.

Layering

Linerless shorts fit with any underwear or compression layer, relaxed cut.

Odor control

Permanent Polygiene on the shell eliminates odor and bacteria, substituting for a liner.

Mobility

Linerless 4.5-inch inseam maximizes mobility for sprints, HIIT, and plyometrics.

Value

At $59 CAD, the shorts bundle recycled polyester and Polygiene, reducing laundry frequency and environmental impact.

Performance

Cuts distal fabric mass by roughly 20 grams to improve running economy.

Linerless design

Unlined design lets runners choose their own briefs for chafe-free comfort.

Eco synergy

Recycled polyester + Polygiene cuts wash impact by a third.

Polygiene treatment

Permanent silver chloride odor control lasts lifetime, certified skin-safe.

Design origin

I.FIV5 shorts are designed in Canada.

Design and materials

I.FIV5 shorts feature the brand's consistent recycled polyester and Polygiene, with a linerless design.

Pocket security

Slit pockets 6 inches deep hold most phones securely; larger models may protrude.

Product record

Title

Piped Stretch Short Without Built-In Brief Length: 4.5"

Brand

I.FIV5

Price

59 CAD

Availability

In stock

How Polygiene keeps the shorts fresh for longer

• Unlike topical sprays that sit on the surface, Polygiene is embedded during the fabric's finishing stage with no extra water or energy, creating a permanent bond that won't wash out, peel, or lose effectiveness over the entire lifespan of the shorts.
• Independent field tests of Polygiene-treated apparel have shown it can go 20 hours of sweaty wear over two weeks without developing any odor, and survive 5+ hours of running and indoor cycling with only a faint smell detectable when pressing your nose directly into the fabric—performance that suggests these shorts can handle a week of workouts or a long weekend trip between washes.
• Polygiene's published lifecycle analysis indicates that skipping every other wash trims a garment's environmental footprint by about one-third, which translates to roughly 3,800 litres of water and 51 kWh of energy saved per year per consumer—so wearing these shorts twice between washes directly cuts resource use.
• Polygiene StayFresh holds bluesign® approval and Oeko-Tex Eco Passport certification, and independent sensitivity tests confirm it's skin-safe for prolonged wear and doesn't interact with your body's natural bacteria—only the odor-causing microbes on the textile.
• The same Polygiene technology is used by elite outdoor brands like Patagonia, Arc'teryx, The North Face, and Montane, indicating that the odor control in these I.FIV5 shorts is trusted for high-output, multi-day mountain and trail activities.
• Pairing Polygiene with the short's recycled polyester fabric creates a dual-benefit sustainability profile: the recycled construction lowers virgin plastic demand, while the need to wash less often can reduce the garment's lifetime environmental impact by roughly a third, according to Polygiene's life cycle data.
• Polygiene StayFresh relies on silver chloride—a naturally occurring silver salt—whose ions block bacterial growth by disrupting cell walls, DNA replication, and enzyme function, so odor-causing microbes can't multiply on the fabric no matter how much you sweat.

Going without a built‑in brief: who it’s for and why

• I.FIV5 explicitly omits the built-in brief on this 4.5-inch short, creating a linerless shell that the wearer pairs with their own chosen underwear — a design that suits anyone who prefers the fit and support of a specific boxer brief (like Saxx or Path Projects) over a generic mesh pouch, and exactly the reason the brand labels it 'Without Built-In Brief.'
• Wearing this unlined short over a compression base layer avoids the bunching and doubled-up friction that commonly results from layering compression gear under a lined short, because there is no existing brief to compete with — a detail that matters for athletes who always train in compression tights and want a clean, non-bulky shell on top.
• The 4.5-inch inseam signals a runner-focused cut, and the absence of a liner follows a logic practiced by serious runners like GearJunkie editor Sean McCoy, who runs year-round in unlined shorts because a personally chosen boxer brief consistently outperforms built-in liners for comfort and chafe prevention on the vast majority of training miles, while the reflective i.FiV5 logo adds low-light road safety.
• Because there is no integrated brief to provide moisture-wicking or odor resistance, I.FIV5 applies a permanent Polygiene treatment directly to the recycled polyester shell so the fabric itself actively prevents bacteria and smell — a strategic addition that keeps the unlined shorts fresh even when the only barrier between skin and shell is a thin base layer.

I.FIV5: the private label behind this short

• The collection is designed in Canada, a credential that resonates with buyers who prioritize domestic design and suggests alignment with Canadian performance and aesthetic sensibilities, not just imported generic activewear.
• When iFiv5 launched, its pieces ranged from $8 to $65, establishing a value-first identity; the $59 CAD price tag on these shorts reflects the upper limit of that original spectrum, signaling that they carry a higher feature load — Polygiene and recycled fabric — than the brand's entry-level items.
• Because I.FIV5 is a Simons exclusive sold directly through the retailer's own stores and website, the purchase is backed by Simons' customer service and ease of return — a safety net that generic online activewear brands cannot match.
• Polygiene — a permanent, silver-salt-based odor-control treatment — is a feature typically reserved for premium activewear brands, yet it's standard on these shorts; at $59 CAD, that's an unusually strong technical offering for a private-label short and signals that I.FIV5 prioritizes function over logo markup.
• The light, stretch recycled polyester fabric brings a sustainability story to an affordable short — for eco-conscious buyers, the use of recycled poly at a sub-$60 price point makes it a rare find in a category where recycled materials typically command a premium.
• I.FIV5 is an exclusive private label created for La Maison Simons, the Quebec-based department store, meaning the brand exists to offer curated activewear that cuts out the middleman markup — the $59 CAD price reflects that direct-to-consumer private-label model rather than a discount-quality proposition.

What 4.5 inches of inseam does for your movement

• Following the golden-era pattern of 4- to 5-inch gym shorts, this 4.5-inch cut lands on the upper thigh and keeps the quad visible, a signal embraced by modern weightlifters who want their shorts to stay out of the way of barbell contact and let leg development do the visual talking.
• Even a 20-gram difference in fabric weight at the distal end of the leg can measurably affect metabolic efficiency over long training sessions; the 4.5-inch inseam trims material mass compared to longer shorts, lowering the inertia you fight against with every stride.
• By revealing more quadriceps and hamstring surface than a 7- or 9-inch cut, the 4.5-inch inseam accelerates convective heat loss during high-output work, a direct performance aid when training in uncooled gyms or outdoor summer sessions where overheating compromises repeat-effort power.
• A sub-5-inch inseam is widely regarded as optimal for HIIT, sprints, and calisthenics because it eliminates the fabric panel that would otherwise catch during high-knee drives, lateral shuffles, and rapid directional changes — with 4.5 inches sitting right at the top of that range, these shorts prioritize unrestricted range of motion for plyometric and agility-focused training.