




Free standard shipping across the UK, with no minimum spend.
Free standard UK shipping on all orders. Orders are typically processed in 1–3 business days. The shipping policy estimates most UK deliveries at 5–10 business days; timings are estimates.
Tracking is provided where available. Read our shipping policy for details.
You can request a return within 30 days of receiving your order. Items must be unused, in their original condition and packaging. Hygiene and other exceptions apply.
Please contact us before sending anything back. See our returns and refunds policy for the full terms.
Deliveries to United Kingdom’s outer and remote regions may experience seasonal delays caused by severe weather or limited carrier availability. We appreciate your patience and recommend allowing additional time for your order to arrive safely.
Designed for chilly nights, the Unnivoll Baby Sleep Sack combines a soft 100% cotton outer fabric with a fluffy polyester filling to create a gentle, breathable layer. The 2.5 TOG rating targets room temperatures around 61–68°F, helping your newborn feel snug without overheating. The fabric touch is smooth against delicate baby skin, inviting calm and peaceful naps or overnight sleep.
Thoughtful details and a practical cut work together to support quiet, undisturbed rest. This wearable blanket is a simple, cozy alternative to loose blankets, offering warmth without restricting movement.
The sleep sack comes in multiple sizes to cover early infancy as your little one grows: S (0–6 months), M (6–12 months), L (12–18 months), and XL (18–24 months). The design prioritizes a secure feel at the shoulders and neck while allowing ample room at the bottom for kicking and movement.
Machine washable with a gentle cycle and low-heat tumble dry. The preshrunk fabric and durable stitching help maintain softness and fit wash after wash, making this a practical staple for busy parents.
Usage note: while the product is crafted for warmth, always monitor your baby’s comfort and adjust layers as needed. This sleep sack is intended to provide warmth, security, and convenience, not guarantees of sleep outcomes.
Q: What age and weight is the Unnivoll Baby Sleep Sack suitable for?
A: Designed for 0-6 months; fits 10-18 pounds; check the size chart to choose.
Q: How does the 2-way zipper benefit nightly diaper changes?
A: The smooth two-way zipper allows dressing from top or bottom and easy diaper changes without disturbing baby.
Shipping (UK)
Returns & Refunds
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