Unnivoll 12–18 Month Fleece Sleep Sack, Long Sleeves, 2.0 TOG, 2-Pack

The 12–18-month Unnivoll sleep sack is a fleece wearable blanket made from 100% microfiber polyester. Its long sleeves and 2.0 TOG rating are intended for indoor temperatures of 64–70°F, making it a warmer sleepwear option for fall and winter nights.

This two-pack also gives you a second sack to use while the other is being washed. The roomy design leaves space for kicking, while the two-way zipper is meant to make nighttime diaper changes easier.

Why it’s worth it

The main appeal is the combination of warmth, coverage, and a practical two-pack format. The outer and inner fleece are described as soft, and the long sleeves add coverage without restricting arm movement. For parents choosing between a lighter sleep sack and a warmer wearable blanket, this one is positioned for cooler indoor conditions rather than all-season use.

A two-way zipper can make diaper access more convenient during the night, and a zipper guard at the top helps keep the zipper away from the baby’s chin. What matters more for your routine: extra warmth or easier access for changes? This design addresses both, while the second sack can be useful when one is in the wash.

Key features

The 2.0 TOG rating is specified for indoor temperatures of 64–70°F (18–21°C). That range gives you a concrete starting point when deciding whether a fleece sack is appropriate for the room, it is not a guarantee that the same layer will suit every baby or sleeping environment. The product is made of 100% microfiber polyester, with a soft fleece surface and a longer fleece interior described as helping retain warmth.

The lower portion is designed to give a toddler room to kick while keeping the blanket worn rather than loose in the sleep space. Long sleeves provide additional coverage, and the two-way zipper supports diaper changes without needing to remove the entire sack. A zipper protector at the top is another small design detail aimed at reducing contact between the zipper and the chin.

Care & maintenance

Both sacks can be machine washed and dried at low temperatures, according to the product details. That makes the two-pack useful for regular rotation, though the care information provided does not specify a wash cycle, detergent, or other fabric-care instructions. Follow any care label included with the garment.

Before choosing this 12–18-month size, measure your baby’s height and weight and compare them with the size chart. The listing provides several age-based size options, but age alone does not establish the right fit for an individual child.

When it makes sense

A solid pick if you want a long-sleeve fleece sleep sack for the stated cool-room range and value having two in rotation. It may also suit families looking for a wearable blanket with room for leg movement and a zipper designed with nighttime changes in mind. Compared with a lighter or sleeveless sack, this version emphasizes warmth and coverage, a lighter style may make more sense in a warmer room.

You may want to skip it if you need a sleep sack for temperatures outside the listed range or are shopping for a lighter layer. The product details do not provide garment measurements, so checking the size chart against your baby’s height and weight is important before deciding.