2.5 TOG Sleep Wear

When the nursery sits between 61 and 68°F overnight — drafty older homes, basement bedrooms, cold-snap winter rooms. Below 61°F, raise the thermostat first.

If your nursery sits at 69–75°F overnight in winter (most central-heated US homes do), the 1.0 TOG TENCEL™ is the right weight, not the 2.5 TOG. Doubling a sleeper under a 1.0 TOG is also a common winter solution — but you can overheat a baby that way faster than with a single 2.5 TOG bag in a genuinely cold room.

Sorona is a plant-based polymer fiber DuPont produces from corn-derived feedstock. It traps warmth without bulk and keeps its loft through wash cycles longer than polyester batting.

Yes — and the sleeveless construction is intentional. The arms release heat during sleep; covering them changes the warmth equation. The bag carries the TOG warmth in the body; long-sleeve under-layers (a TENCEL™ sleeper or long-sleeve bodysuit) cover the arms.

Most premium 2.5 TOG sleep sacks use bamboo rayon shell with polyester fill. Ours uses TENCEL™ Lyocell shell with DuPont™ Sorona plant-based insulation. The Sorona keeps its loft through more wash cycles than polyester batting, and the TENCEL™ shell is more durable through repeated washing than bamboo rayon.