On Running apparel sizing: does it run small or true to size for Indian buyers?

On apparel runs European slim through the torso and sleeve. Indian buyers with an athletic or broader build typically size up one from their standard T-shirt size. The Core-T and race singlets are cut for lean running frames; if you prefer a relaxed wear-everywhere fit, go one size up from your usual. The Challenger jacket has more room through the shoulders than the base layer pieces.

Training tops vs. lifestyle tops from On: what's the actual material difference?

On's training range uses a moisture-wicking polyester mesh blend that dries in 20 to 30 minutes; the fabric is open-weave and breathable for gym or track sessions. The lifestyle pieces (Core-T line) use a heavier knit with a more opaque finish that reads as a premium casual T. Both are machine-washable but the technical mesh is more forgiving of repeated high-heat activity. For daily casual wear in India's heat, the Core-T is the more comfortable choice.

Do On caps and accessories from the same collection match the apparel colourways?

On designs its accessories to co-ordinate within seasonal colourways rather than exact colour matches, so the Lightweight Cap in white pairs with any On base layer. The caps use a wicking sweatband inside, which handles Indian heat better than a standard cotton-lined cap. The Trail Hat adds a longer bill for outdoor use. Both are unstructured fits that pack flat.