Quick answer
For most winter nurseries (65-70°F), a TOG 1.0 micro-fleece wearable blanket offers the right warmth without overheating. Look for a sack with a roomy bottom for hip health and a zipper for easy diaper changes.
Why micro-fleece works for winter
Micro-fleece is a synthetic fabric that traps body heat while staying breathable. It feels soft against a baby's skin and doesn't add heavy bulk, making it easier for your baby to move and roll during sleep. Unlike cotton, micro-fleece dries quickly and holds warmth even if it gets slightly damp.
TOG 1.0 vs. higher TOG ratings
TOG stands for Thermal Overall Grade. A TOG 1.0 wearable blanket is designed for room temperatures between 65°F and 70°F (18°C-21°C), which covers most heated homes in winter. Higher TOG ratings (1.5, 2.0, 2.5) are for colder rooms. If your nursery is above 72°F, a TOG 1.0 micro-fleece sack may be too warm. In that case, choose a lighter muslin or cotton sack with a lower TOG.
Decision rules for choosing a micro-fleece wearable blanket
- Check the room temperature: Use a room thermometer to confirm the nursery is between 65°F and 70°F (18°C-21°C) before choosing a TOG 1.0 sack. If the room is cooler, consider a TOG 1.5 or 2.0 sack instead.
- Match TOG to your baby's clothing: Under a TOG 1.0 micro-fleece sack, dress your baby in a long-sleeve onesie or footed pajamas. For a warmer room, use a short-sleeve onesie. Avoid adding extra blankets or hats inside the crib. A good rule: what you'd wear to sleep comfortably in that room is a guide for your baby's layers.
- Check the fit: The sack should be snug around the chest and arms but roomy enough for the legs to move freely. The neck opening should be no larger than your baby's head. Always follow the manufacturer's weight and size chart. A too-large sack can ride up over the face; a too-small sack restricts hip movement.
- Look for hip-healthy design: Choose a wearable blanket with a wide, roomy bottom that allows your baby's hips and legs to move naturally. This supports healthy hip development and makes the sack usable longer as your baby grows.
Product facts
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Wearable Blanket Micro-Fleece TOG 1.0: HALO SleepSack is the original wearable blanket, designed for safe sleep. It features a zipper for easy diaper changes and a roomy, extra-long sack that supports hip health and extends use. The roomy sack design allows natural hip movement and the zipper makes middle-of-the-night changes faster, so your baby stays drowsy and you get more sleep.
Wearable Blanket Micro-Fleece TOG 1.0
Who should choose a micro-fleece wearable blanket
Best for
- Babies in rooms kept between 65°F and 70°F during winter
- Parents who want a soft, warm, and breathable sleep sack that's easy to clean
Not for
- Babies in rooms above 72°F (choose a lighter cotton or muslin sack)
- Parents who prefer a swaddle-style wrap (micro-fleece sacks are for arms-free sleep)