On
Core-T Tee
The Core-T Tee is a lightweight, ultra-breathable short-sleeve crew-neck t-shirt constructed from stretch microfibre jersey with a fully micro-perforated finish. It is intended for athletic and casual wear, featuring a relaxed straight cut, a small white reflective logo on the left chest, and a second white 'on' logo near the lower-right hem on the back. Key specifications include a smooth knit fabric with a subtle sheen, short loose sleeves, and a straight hem with double-stitched seams.
- Material
- Stretch microfibre jersey
- Gender
- unisex
- Style
- casual
- Category
- Apparel & Accessories > Clothing > Activewear
Color
Size
Specifications
Lightweight, ultra-breathable tee made from stretch microfibre jersey with micro-perforated details and reflective logo.
Micro-perforated fabric for breathability, stretch jersey, reflective logo.
- Material
- Stretch microfibre jersey
- Secondary
- elastane
- Style
- casual
- Occasion
- casual, everyday
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- lightweight microfibre jersey fabric
- ultra-breathable micro-perforated design
- stretch construction
- reflective logo
- back-to-basics style
Product Insights
The Core-T Tee is On's most affordable technical tee at $80 CAD, made from 92% recycled polyester/8% spandex to cut carbon emissions by ~30% while retaining breathability, moisture-wicking, and durability. Its full-body micro-perforation provides uniform cooling and faster evaporation, saving weight over heavy mesh. The regular, never-clingy fit works as a running tee and everyday layer, with loop-geometry stretch that snaps back without sagging. The microfibre jersey feels soft and smooth, is abrasion-resistant, and retains shape after washing. Marketed as an all-season everyday running staple, it suits standalone or base-layer use year-round.
Verified claims
- Fit and crossover
- Regular, never-clingy fit works as both a running tee and an everyday layer.
- Breathability
- Full-body micro-perforation provides uniform cooling and faster evaporation.
- Weight
- Micro-perforation saves weight versus heavy mesh ventilation panels.
- Moisture management
- Microfibre fibres wick sweat and micro-perforations accelerate evaporation.
- Stretch
- Loop geometry provides stretch that snaps back without sagging.
- Softness
- The jersey feels soft and smooth, avoiding rough synthetic feel.
- Competitive pricing
- At 80 CAD, the Core-T is On's most affordable technical tee, undercutting the $80 Performance-T.
- Recycled polyester
- 92% recycled polyester/8% spandex matches top competitors and cuts carbon emissions ~30%.
- Performance
- Retains breathability, moisture-wicking, and durability despite recycled polyester construction.
- Positioning
- Marketed as an everyday running staple with all-season versatility, sustained by recycled material.
- Versatility
- Designed for year-round use, fits as standalone or base layer.
- Care instructions
- Machine wash cold, tumble dry low; avoid fabric softeners.
- Abrasion resistance
- Microfibre jersey is inherently abrasion-resistant, reducing fraying and thinning.
- Shape retention
- Microfibre jersey retains shape after washing, preventing sag.
Product record
- Title
- Core-T Tee
- Brand
- On
- Price
- 80 CAD
- Availability
- In stock
Image Analysis
2 images- 01
Product
Front view of a short-sleeve black crew-neck t-shirt worn by a model; small white stacked logo on left chest; relaxed straight hem and smooth knit fabric with slight sheen.
- SilhouetteShort-sleeve crew-neck t-shirt with a relaxed, straight cut that falls below the waist on the model.
1 region
x 0.15 · y 0.20 · w 0.70 · h 0.70 (high) - NecklineRound crew neckline with a narrow band of the same fabric.
1 region
x 0.35 · y 0.12 · w 0.30 · h 0.10 (high) - SleevesShort sleeves with a loose fit ending above the elbow; sleeve hem has a visible double-stitched seam.
2 regions
x 0.15 · y 0.24 · w 0.25 · h 0.18 (high); x 0.60 · y 0.24 · w 0.25 · h 0.18 (high) - Fabric appearanceSmooth knit fabric with a subtle sheen consistent with a lightweight performance material; surface shows faint horizontal texture under close inspection.
1 region
x 0.20 · y 0.28 · w 0.60 · h 0.40 (medium) - Chest logo“Small white stacked logo composed of a small circle above a lowercase character, placed on the left chest.”
1 region
x 0.52 · y 0.22 · w 0.06 · h 0.09 (high) - HemStraight hem at the bottom of the tee with visible stitch line.
1 region
x 0.22 · y 0.78 · w 0.56 · h 0.10 (high) - Visible seamsSeam lines visible at shoulders and sleeve hems, finished with matching thread.
1 region
x 0.22 · y 0.18 · w 0.56 · h 0.12 (high) - Fit on modelTee appears loose through the torso on the model rather than form-fitting.
1 region
x 0.28 · y 0.30 · w 0.44 · h 0.45 (high)
Other
Studio shot showing a model wearing the tee against a light gray gradient background; even studio lighting with soft shadows; image framed from mid-thigh to above the head, centered composition.
- BackgroundNeutral light gray gradient backdrop with no visible props.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Shot compositionCentered frontal portrait of a standing model cropped from mid-thigh to above the head.
1 region
x 0.06 · y 0.04 · w 0.88 · h 0.92 (high) - Lighting and shadowEven soft studio lighting with minimal harsh shadows and a slight shadow cast to the model's right side.
1 region
x 0.30 · y 0.10 · w 0.40 · h 0.80 (medium)
Colors
black· main body#0E0E0Ewhite· chest logo- SilhouetteShort-sleeve crew-neck t-shirt with a relaxed, straight cut that falls below the waist on the model.
- 02
Product
Rear view of a black short-sleeve tee worn by a model; plain back panel with a small white brand logo near the lower right hem.
- Back panelFull back of a short-sleeve tee shown; smooth, slightly draping fabric with faint vertical folds and minimal visible seam lines near shoulders and hem.
1 region
x 0.14 · y 0.08 · w 0.72 · h 0.86 (high) - Sleeve shapeShort sleeves with a loose fit ending above the elbow and a visible stitched hem along the sleeve edge.
2 regions
x 0.14 · y 0.18 · w 0.28 · h 0.20 (high); x 0.58 · y 0.18 · w 0.28 · h 0.22 (high) - NecklineCrew neckline visible from the rear with a narrow stitched collar band.
1 region
x 0.38 · y 0.06 · w 0.25 · h 0.08 (high) - Lower-right logo“Small white lowercase 'on' logo printed near the lower-right hem on the back of the tee.”
1 region
x 0.60 · y 0.78 · w 0.07 · h 0.10 (high) - HemStraight bottom hem with visible double-stitched seam running across the width of the shirt.
1 region
x 0.16 · y 0.80 · w 0.68 · h 0.10 (high)
Other
Studio product shot showing a model from the rear against a plain light gray background with even studio lighting and soft shadows.
- Model poseMale model standing facing away from the camera with head turned slightly to the right and arms relaxed at sides.
1 region
x 0.20 · y 0.04 · w 0.62 · h 0.92 (high) - Background and lightingEven neutral light gray background with soft, diffused studio lighting and faint shadowing behind the model.
- Image cropFull-body crop from upper head to mid-thigh with lower legs out of frame.
1 region
x 0.05 · y 0.00 · w 0.90 · h 0.98 (high)
Colors
black· shirt body#0D0D0Ewhite· lower-right logo- Back panelFull back of a short-sleeve tee shown; smooth, slightly draping fabric with faint vertical folds and minimal visible seam lines near shoulders and hem.