The Cool Beginning.

For the baby arriving into a heated nursery, the long winter months when the room rarely climbs above twenty.

The Tot Swaddle in 2.5 TOG, the warmest of our newborn layer. Five Tot Bodysuit Long Sleeve, enough that the laundry never feels urgent. Three Tot Suits beneath, with flip-over cuffs for the coolest nights. Two muslins for everything outside the cot. The thermometer that tells you when the room is ready.

The first weeks at home, considered.

The Cool Transition.

For the night swaddling ends, in the cooler half of the year.

Somewhere between three and five months, a baby's arms find the world. The Tot Convertible begins arms-in and ends arms-out — the same bag, week by week. When the transition is complete, the Tot Bag in 2.5 TOG continues uninterrupted, sized for cool rooms.

Three long-sleeve bodysuits beneath, two Tot Suits for the coldest nights. The hardest sleep step of the first year, met with a single bundle.

The Cool Rhythm.

For the baby who sleeps. Six months in, the system is established — the question is no longer how, but in what.

Two Tot Bags in cool-room TOGs: 1.5 for milder evenings, 2.5 for cold ones. Three long-sleeve bodysuits in the next size, ready for a baby who has grown out of the last. Two Tot Suits, now without cuffs, with silicone grip soles for the standing weeks ahead. A fitted cot sheet to complete the environment.

The second half of the first year, prepared.