What the four common labels mean
100% cotton: one fibre, best ink absorption, best hand feel for a retail tee, and the one that shrinks and holds water.
65/35 polyester/cotton: poly-dominant, so it resists shrinkage, dries faster and costs less. It is the standard for promotional and event work because the print sits on a dimensionally stable surface.
CVC (Chief Value Cotton): cotton-dominant, usually 60/40 or 55/45. It reads like cotton in the hand with some of the stability of polyester, which is why it dominates mid-tier retail.
Tri-blend: cotton, polyester and rayon. The rayon is what gives the soft drape and the slightly heathered look; it is also what makes the fabric less structured and more prone to growing.
The four things that actually change your programme
Shrinkage: cotton knits relax and shrink on the first wash, typically 4–6% in length for a standard jersey. Polyester resists it, so the higher the poly share the more predictable the size run after washing.
Drying: cotton holds water, polyester does not. In a humid market or a gym programme, this decides whether the shirt is wearable again the next day.
Print: cotton takes water-based and discharge ink properly; polyester needs low-bleed or poly-specific ink and can sublimate colour under heat. A 65/35 shirt printed with a cotton recipe is a common cause of a colour shift.
Pilling and hand: rayon in a tri-blend softens the drape but shortens the life of the surface. A tri-blend is a fashion choice, not a durability choice.
- Higher cotton → better print, softer hand, more shrink, slower dry.
- Higher polyester → more stable, faster dry, cheaper, more print constraints.
- Rayon → drape and a heather look, at the cost of structure.
Why "cotton-rich" is not the same as 100% cotton
A CVC at 60/40 behaves noticeably differently from 100% cotton on the washing machine test, and buyers often treat them as interchangeable because both feel like cotton in the shop.
If the programme has a size guarantee after five washes, the blend question is a commercial question, not a comfort question.
Choosing for a programme rather than for a preference
A retail line with a fine print and a softness claim: 100% combed ring-spun cotton, pre-shrunk.
A run of event shirts in several sizes, ordered once: 65/35, because the size run after washing matches the size run before.
A mid-tier retail tee that must feel like cotton and survive repeated washing: CVC.
A fashion drop where drape matters more than longevity: tri-blend, with the shrink risk priced in.
The blend is a specification, not a grade. What it decides is how the shirt behaves after the twentieth wash, which is when the customer forms the opinion that matters.