What age does the O, 1, 2 size run fit?

Size O suits the youngest hands, roughly under a year old, size 1 fits around 12-18 months, and size 2 fits around 18 months to 3 years. Hand size varies more than height at this age, so if you're between sizes, measure your child's hand and compare it to Lenne's size chart.

What does the 10,000 mm waterproof rating actually mean?

Fabric is generally considered waterproof once it holds back a water column of 3,000 mm. At 10,000 mm, this Active+ fabric comfortably exceeds that, so it holds up through puddle-splashing and steady rain, not just damp grass.

Will hands overheat inside?

No. The fabric is also rated to 10,000 g/m²/24h breathability, so moisture vapour and body heat escape rather than building up inside the mitten, which is what keeps hands warm rather than clammy.

How does the zipper help with fit?

It opens the mitten almost flat, so it's easier to guide a child's whole hand in at once rather than pushing fingers through a narrow cuff, and it also makes the mitten simpler to put on over a jacket sleeve.

How should I wash them?

Close the zipper before washing, wash at the temperature on the care label, skip fabric softener, and air-dry away from direct heat. Avoid soaking, since it can cause the print to bleed.

How does this compare to the Pink Reflective Mittens without a zipper?

Both use the same Active+ waterproof, breathable fabric and fleece lining. This zip version is the quicker one to get on and off; the non-zip Pink Reflective Mittens are a simpler, lighter alternative if you'd rather have fewer moving parts.

Where is the reflective print positioned?

It's printed on the outer side of the mitten, so it catches headlights and streetlights on darker walks in addition to the mitten's own colour visibility.